Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk from that link: How its works: * Open your RGB image in Gimp via File Open * Start Seperate+ Image Window Image Seperate Seperate * Setup the profiles, may as source Adobe 1998 and as destination profile Euroscala V2 * Press OK, an image with 4 layers is created * Each layer represents a color channel of CMYK * Now save the image as CMYK Tiff at Image Window Image Seperate Save... ew... That is really, really not an acceptable implementation of CMYK. It's the kind of thing that could be applied as a filter afterwards. It doesn't let you work in CMYK with any kind of ease, you still work in RGB and then do some kind of hideous conversion that would be almost impossible to fine tune. The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support -- Bring choice back to your computer. http://www.linux.org.au/linux -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
Sridhar Dhanapalan wrote: 2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk from that link: How its works: * Open your RGB image in Gimp via File Open * Start Seperate+ Image Window Image Seperate Seperate * Setup the profiles, may as source Adobe 1998 and as destination profile Euroscala V2 * Press OK, an image with 4 layers is created * Each layer represents a color channel of CMYK * Now save the image as CMYK Tiff at Image Window Image Seperate Save... ew... That is really, really not an acceptable implementation of CMYK. It's the kind of thing that could be applied as a filter afterwards. It doesn't let you work in CMYK with any kind of ease, you still work in RGB and then do some kind of hideous conversion that would be almost impossible to fine tune. The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support quote Color support GIMP also has a palette with RGB, HSV, color wheel, CMYK, and mixing modes, plus tools to pick colors from the image with various averaging options. There is support for hexadecimal color codes (as used in HTML). CMYK colors are immediately translated into RGB when used; GIMP does not have any built-in support for CMYK mixtures that cannot be represented in RGB, such as rich blacks, though they can be simulated to a limited extent with third-party add-ons.[citation needed] /quote doesn't sound like native to me... I hope I'm wrong -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
On 17/05/2009, at 5:46 PM, Sridhar Dhanapalan wrote: 2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk --8-- snipped --8-- The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support Citing that exact link: ...GIMP does not have any built-in support for CMYK mixtures that cannot be represented in RGB, such as rich blacks, though they can be simulated to a limited extent with third-party add-ons. I wouldn't call that CMYK natively - I'd consider that partial implementation. They really need to offer a CMYK editing mode completely divorced of Gimp's RGB heritage. -- James -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HOT SWAPPING - back to the OP ;-)
Daniel Pittman wrote: david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: [...] ChipDriver NCQ DMA++ hotplug PMP ICH7 family ata_piix, ahci AHCIAHCIAHCIno Since I still don't want to fry the drive, the question still remains (for me at least, given that I'm not as erudite as some) Will this hotplug?? Yes, if you are running it in AHCI mode. Specifically, you have to be in something other than compatibility mode in the BIOS, and it has to identify as an AHCI controller during boot. [...] Nothing in dmesg. As far as I can see, nothing in BIOS :( That sucks. Sadly, it was the fashion for vendors to offer only the compatibility mode of operation for a while. You could try lsmod | egrep 'ahci|piix' and see what the output is. If both are present, and both are in active use life is harder, but just one present would be a start. da...@david:~$ lsmod | egrep -i ahci|piix ata_piix 24580 4 libata177312 3 pata_acpi,ata_generic,ata_piix I found this: http://linux-ata.org/driver-status.html quote 2. Hardware support Intel ICH IDE mode Driver name: ata_piix Summary: No TCQ/NCQ. Looks like a PATA controller, but with a few added, non-standard SATA port controls. Hardware does not support hotplug. Warmplug support is possible. Update: ICH6/7/8 include support for addressing the SATA PHY registers. This is not yet supported in Linux, mainly because some BIOS do not fill in the necessary (PCI BAR) resources. Update: Boot-time, probe-time issues continue to persist in some cases, related to the PCS register. The ata_piix driver in 2.6.18 and later provides a force_pcs module option to help users deal with this (values: 0=default, 1=ignore PCS, 2=honor PCS). Play around with 'force_pcs' if you have device detection problems. /quote I wonder what warmplug means? This seems to suggest that hot swapping this particular configuration is a bad idea. And yet Gnome was telling me that I could remove the media. Is this a bug? Well, I have no idea, I fear. Unfortunately, hardware specifications tend to tell you what a BIOS/Controller/MB *has*, not what it doesn't have. *nod* Also, the operating mode is probably not going to be listed, so even ICH7 SATA doesn't tell you everything you need to know. [...] Not being able to hot-swap for me is mostly an inconvenience rather than a disaster, but I recently had an emergency situations where I would REALLY liked to have been able to hot swap. *nod* Well, you /could/ test it: drop to single user mode, remount critical filesystems read-only, sync, and pull the device. Then look for error messages. ;) Regards, Daniel -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
On 17/05/2009, at 5:46 PM, Sridhar Dhanapalan wrote: 2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk --8-- snipped --8-- The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support Citing that exact link: ...GIMP does not have any built-in support for CMYK mixtures that cannot be represented in RGB, such as rich blacks, though they can be simulated to a limited extent with third-party add-ons. I wouldn't call that CMYK natively - I'd consider that a partial implementation. They really need to offer a CMYK editing mode completely divorced of Gimp's RGB heritage. -- James -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] HTTP server recommendations?
Hi all, I need a HTTP server running on Linux with: - easy setup - cgi - SSL The server will not be at all heavily loaded. Recommendations? Apache, boa, lighttpd, something else? Erik -- -- Erik de Castro Lopo http://www.mega-nerd.com/ -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HTTP server recommendations?
Erik de Castro Lopo wrote: Apache, boa, lighttpd, something else? Rob Collins on irc suggested Apache so I installed that from an Ubuntu Hardy package. The setup was much easier than I remember it being. Standard HTTP and CGI worked out of the box. I would still be interested in hearing about people using other servers and their reasons. Cheers, Erik -- -- Erik de Castro Lopo http://www.mega-nerd.com/ -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HTTP server recommendations?
Erik == Erik de Castro Lopo mle+s...@mega-nerd.com writes: Erik Erik de Castro Lopo wrote: Apache, boa, lighttpd, something else? Erik Rob Collins on irc suggested Apache so I installed that from an Erik Ubuntu Hardy package. The setup was much easier than I remember Erik it being. Standard HTTP and CGI worked out of the box. Erik I would still be interested in hearing about people using other Erik servers and their reasons. I'm using Xitami on one of my (virtual) servers, because it is much lighter weight than Apache for what I want. And I generally install boa when I want something that's GPL on an embedded system, because of its low resource usage for static HTML and simple forms. Peter C -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HTTP server recommendations?
2009/5/17 Erik de Castro Lopo mle+s...@mega-nerd.commle%2bs...@mega-nerd.com Erik de Castro Lopo wrote: Apache, boa, lighttpd, something else? Rob Collins on irc suggested Apache so I installed that from an Ubuntu Hardy package. The setup was much easier than I remember it being. Standard HTTP and CGI worked out of the box. I would still be interested in hearing about people using other servers and their reasons. I've always liked lighttpd. I like the conf's. I once got it to run rails and mediawiki on a really small vps and it was a lot faster out of the box than apache. That being said I think there were issues with it and proxying and with rails not that that would affect you with your stuff.. The other one I've used and liked is nginx. It's fast and light and quite capable and this is what I use for rails with reverse proxying to some backend http app servers..However I'm looking at apache again for doing this sort of stuff as well. I should add that I haven't really been researching or trying anything new lately so my views may be a little out of date on these things. -- Daniel Bush http://blog.web17.com.au -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HTTP server recommendations?
Apache is always a great choice. Apache 2 is extremely modular and allows for some mind boggling configuration arrangements. The configuration is somewhat intimidating, but debian has packaged it up to make it much more convenient (and possibly less intimidating). If ubuntu has borrowed this arrangement then the same will be true for ubuntu. Its worth considering that lighttpd, boa etc have significantly less features than apache (how many of these features are in the 80% commonly used 20% rare ratio is of course debatable). So you may find yourself setting up non-apache now, then finding yourself having to convert to apache later, or implement something in an awkward way that apache would do elegantly. I would certainly advocate something like nginx as a load balancer or ssl reverse proxy if the website warranted it. Dean On 5/17/2009, Erik de Castro Lopo mle+s...@mega-nerd.com wrote: Erik de Castro Lopo wrote: Apache, boa, lighttpd, something else? Rob Collins on irc suggested Apache so I installed that from an Ubuntu Hardy package. The setup was much easier than I remember it being. Standard HTTP and CGI worked out of the box. I would still be interested in hearing about people using other servers and their reasons. Cheers, Erik -- -- Erik de Castro Lopo http://www.mega-nerd.com/ -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HOT SWAPPING - back to the OP ;-)
david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: [...] Nothing in dmesg. As far as I can see, nothing in BIOS :( That sucks. Sadly, it was the fashion for vendors to offer only the compatibility mode of operation for a while. You could try lsmod | egrep 'ahci|piix' and see what the output is. If both are present, and both are in active use life is harder, but just one present would be a start. da...@david:~$ lsmod | egrep -i ahci|piix ata_piix 24580 4 libata177312 3 pata_acpi,ata_generic,ata_piix So, only the PIIX mode drivers. Alas, unless your BIOS supports a switch out of compatibility mode, or there is a newer BIOS, you are probably not going to get real hotswap ... and the GNOME report is a fib. :/ I found this: http://linux-ata.org/driver-status.html That is outdated by the wiki link, where the newer status updates have migrated. I wish the Linux SATA people would automatically redirect, but such is life. Regards, Daniel -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HTTP server recommendations?
Erik de Castro Lopo mle+s...@mega-nerd.com writes: I need a HTTP server running on Linux with: easy setup, cgi, SSL The server will not be at all heavily loaded. Recommendations? Apache, boa, lighttpd, something else? Apache. It still sees the most testing of any of the Linux options, which means that it is the most likely to be secure, and the most likely to be fixed first if it isn't. I would recommend NGINX, but it doesn't do CGI, so doesn't meet your needs. Beyond that, base it on popularity: lighttpd is a good choice, because it is fairly popular, but not at the same level as Apache.[1] http://news.netcraft.com/archives/2009/01/16/january_2009_web_server_survey.html Regards, Daniel Footnotes: [1] Not popular enough to list as a distinct entry in the NetCraft surveys, however. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
david wrote: Sridhar Dhanapalan wrote: 2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk from that link: How its works: * Open your RGB image in Gimp via File Open * Start Seperate+ Image Window Image Seperate Seperate * Setup the profiles, may as source Adobe 1998 and as destination profile Euroscala V2 * Press OK, an image with 4 layers is created * Each layer represents a color channel of CMYK * Now save the image as CMYK Tiff at Image Window Image Seperate Save... ew... That is really, really not an acceptable implementation of CMYK. It's the kind of thing that could be applied as a filter afterwards. It doesn't let you work in CMYK with any kind of ease, you still work in RGB and then do some kind of hideous conversion that would be almost impossible to fine tune. The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support quote Color support GIMP also has a palette with RGB, HSV, color wheel, CMYK, and mixing modes, plus tools to pick colors from the image with various averaging options. There is support for hexadecimal color codes (as used in HTML). CMYK colors are immediately translated into RGB when used; GIMP does not have any built-in support for CMYK mixtures that cannot be represented in RGB, such as rich blacks, though they can be simulated to a limited extent with third-party add-ons.[citation needed] /quote doesn't sound like native to me... I hope I'm wrong What is CMYK and what is it's significance for NSW Schools? From what I can tell quick google it seems to be related to printing (and possibly PDF) ...this is not important (and possibly the greatest obstacle), to Digital/Electronic literacy. Fancy feature based comparisons of products is usually used as a counter example to disprove a case rather than build a case. Since 2004, Gimp has worked well for me - I routineley use it to manipulate JPG photos for publishing on the web and emailing! Feedback is how do I end up with such small photos fast, friendly webpages? Marghanita -- Marghanita da Cruz http://www.ramin.com.au Phone: (+61)0414 869202 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] Backup theory
I've got the following: 2 x servers - single small hard drives in each 1 x desktop - four hard drives including one removeable drive in a caddy intended solely for back up purposes. I run Mondo on the two servers periodically with the intention of being able to do a disaster [1] recovery quickly. Mondo produces 2 DVD images for each server. I run rsync nightly (good enough for my purposes) for more volatile data such as email, databases etc. Everything is very tidy. The desktop has about 350G of data and software. The software is unbelievably complicated because I use it to test server set-ups and odd bits of software etc. In other words, it's a dog's breakfast. I would like to run Mondo or something similar on this machine too, but I fear it would not be practical. At the moment I run rsync for the most obvious data, but that doesn't help with all the complicated software, and I would like to be able to recover that too in the event of disaster [1]. What's the current best practice for back up in this kind of situation? thanks, David [1] Disaster such as: earthquake, fire, pestilence, inappropriate rm. PS: On a Mac, you can usually take a hard drive out of one machine and put it in another and it will just work. How much tweaking to get the same result on linux/ubuntu? -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Backup theory
Daniel Pittman wrote: david da...@kenpro.com.au writes: I've got the following: 2 x servers - single small hard drives in each 1 x desktop - four hard drives including one removeable drive in a caddy intended solely for back up purposes. I run Mondo on the two servers periodically with the intention of being able to do a disaster [1] recovery quickly. Mondo produces 2 DVD images for each server. I run rsync nightly (good enough for my purposes) for more volatile data such as email, databases etc. Everything is very tidy. The desktop has about 350G of data and software. The software is unbelievably complicated because I use it to test server set-ups and odd bits of software etc. In other words, it's a dog's breakfast. I would like to run Mondo or something similar on this machine too, but I fear it would not be practical. At the moment I run rsync for the most obvious data, but that doesn't help with all the complicated software, and I would like to be able to recover that too in the event of disaster [1]. What's the current best practice for back up in this kind of situation? It varies. Personally, I take advantage of the fact that a Linux system has no magic metadata, so a copy of all the files is enough to perform a bare-metal restore. So this suggests to me that I could make a # cp -a of my root/boot drive onto an empty drive which I then remove and take off-site, rsync'ing it periodically? Or is it necessary to use dd? Where does the MBR fit into this? The problem with any back up system is that normally you only find out that it works for sure when you really *need* it to work. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] Backup theory
David I run a backup server using systemimager (see http://wiki.systemimager.org/index.php/Main_Page ) It is a 'killer application' as far as I am concerned. I sleep well every night knowing I have a my servers and my desktop hard disks imaged. Planning to test a couple of 1TB USB external hard disk running systemimager. Boot from USB and swap to the second drive to have one off site. Two backups may be better for stuff you do not want lost. Cheers David Andresen The only means of strengthening one's intellect is to make up one's mind about nothing, to let the mind be a thoroughfare for all thoughts. - John Keats -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Backup theory
david da...@kenpro.com.au writes: I've got the following: 2 x servers - single small hard drives in each 1 x desktop - four hard drives including one removeable drive in a caddy intended solely for back up purposes. I run Mondo on the two servers periodically with the intention of being able to do a disaster [1] recovery quickly. Mondo produces 2 DVD images for each server. I run rsync nightly (good enough for my purposes) for more volatile data such as email, databases etc. Everything is very tidy. The desktop has about 350G of data and software. The software is unbelievably complicated because I use it to test server set-ups and odd bits of software etc. In other words, it's a dog's breakfast. I would like to run Mondo or something similar on this machine too, but I fear it would not be practical. At the moment I run rsync for the most obvious data, but that doesn't help with all the complicated software, and I would like to be able to recover that too in the event of disaster [1]. What's the current best practice for back up in this kind of situation? It varies. Personally, I take advantage of the fact that a Linux system has no magic metadata, so a copy of all the files is enough to perform a bare-metal restore. I think use BackupPC[1] to provide me a space-efficient copy of all the files. In normal use the web interface is sufficient to recover from most problems. In a disaster I boot from a LiveCD, partition, format, etc, the disks, and then use a combination of the command-line tar creation code in BackupPC, netcat, and tar in the LiveCD to stream the data back over the network. This is reasonably easy to achieve, but requires a little low level knowledge of how partitioning, etc, work under Linux. Mondo does capture that information much more nicely, I confess. PS: On a Mac, you can usually take a hard drive out of one machine and put it in another and it will just work. How much tweaking to get the same result on linux/ubuntu? With a recent Debian or Ubuntu, zero.[2] Getting X running again after doing that /might/ take a bit of work, but not much, and the basic system itself should be good. If you use something less capable, like older RHEL systems, a fair bit of work is required to get it booting, but the basic process is more or less the same. I don't know where Fedora sits, but I presume they have also moved more to the Debian new-style ship all the drivers in initramfs, detect the hardware strategy than the older RHEL ship exactly what is required for the current machine, hard code everything model. Regards, Daniel Footnotes: [1] http://backuppc.sf.net/ [2] Technically, you need to ensure the CPU architecture is compatible, so an x86_64 deployment will not run on an i386-only host, but otherwise you are good to go. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Backup theory
Dean Hamstead d...@fragfest.com.au writes: PS: On a Mac, you can usually take a hard drive out of one machine and put it in another and it will just work. How much tweaking to get the same result on linux/ubuntu? network cards and significantly different disk devices (ie pata, sata, some strange raid) are usually the only hurdle Not so much, these days, if you are sensible. [...] network cards are usually just a matter of changing the mac address, or some other minor changes This is fair. As a side note, under /etc/udev you will find the configuration file that binds the persistent names (eth0, etc) to your hardware, which you may need to alter if you want to change those persistent names. [...] hard disk games with /dev/hda /dev/sda /dev/cciss /dev/someotherraidthing are usually just a matter of editing the fstab and rebooting. in this instance setting init=/bin/bash in grub/lilo is your friend. Actually, these days you would have to be kind of silly to use something other than mount-by-LABEL or mount-by-UUID[1], given the fairly dynamic nature of device discovery. In that case you system will just work(tm) on the new hardware, because it identifies what to mount based on the filesystem, not the hardware it happens to be sitting on top of. Regards, Daniel Footnotes: [1] I prefer the later, because the chance of a conflict is zero, while the former is pretty high — especially with some distributions naming their root partition '/' uniformly. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
nginx and boa thoughts [Was: [SLUG] HTTP server recommendations?]
quote who=Erik de Castro Lopo Erik de Castro Lopo wrote: Apache, boa, lighttpd, something else? Rob Collins on irc suggested Apache so I installed that from an Ubuntu Hardy package. The setup was much easier than I remember it being. Standard HTTP and CGI worked out of the box. I would still be interested in hearing about people using other servers and their reasons. In this case, given your requirements (CGI + SSL), Apache is probably the easiest choice (particularly the Debian/Ubuntu packaging, which is nicely set up and very helpful). I've been playing with nginx in front of Apache recently, and aside from the minor problem of nginx not doing keepalive to backends, it has been great. Easy setup, really easy SSL, and for CGI I generally pass back to Apache or boa (which is a lovely little server, particularly for embedded use cases -- but it won't do SSL for you). nginx 0.7.x (which I track in my PPA) does front-end caching too, which is very handy. Just some thoughts. :-) - Jeff -- linux.conf.au 2010: Wellington, NZ http://www.penguinsvisiting.org.nz/ Toothpaste is the most important meal of the day. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] HOT SWAPPING - back to the OP ;-)
On Sun, 2009-05-17 at 18:48 +1000, david wrote: I wonder what warmplug means? AIUI its 'suspend, attach device, resume'. So there is power on but no activity during the attach/detach event. -Rob signature.asc Description: This is a digitally signed message part -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
Marghanita da Cruz wrote: david wrote: Sridhar Dhanapalan wrote: 2009/4/2 Ben shadr...@gmail.com: 2009/4/2 Erik de Castro Lopo mle+s...@mega-nerd.com: Ben wrote: GIMP and Inkscape can't do CMYK, Does this not do it for Gimp? http://my.opera.com/area42/blog/gimp-cmyk from that link: How its works: * Open your RGB image in Gimp via File Open * Start Seperate+ Image Window Image Seperate Seperate * Setup the profiles, may as source Adobe 1998 and as destination profile Euroscala V2 * Press OK, an image with 4 layers is created * Each layer represents a color channel of CMYK * Now save the image as CMYK Tiff at Image Window Image Seperate Save... ew... That is really, really not an acceptable implementation of CMYK. It's the kind of thing that could be applied as a filter afterwards. It doesn't let you work in CMYK with any kind of ease, you still work in RGB and then do some kind of hideous conversion that would be almost impossible to fine tune. The point of CMYK is that you create stuff in the appopriate colours: My printing recommends the following: * Black text: 100%K, 0% all others * Black backgrounds: 100%K, 30%C, 0% others RGB gets converted to CMY(Cyan, Magenta, Yellow)(with no K(Black) channel). This leads to imperfect blacks in printing, and 3x the ink being dumped to form black leads to smearing, drying issues etc. Text ends up with fuzzy colour speckles around it too. The GIMP plugin will not resolve these issues as every part of the image would have to be hand tuned after being created, which is really not practical. GIMP does CMYK natively now: http://en.wikipedia.org/wiki/The_gimp#Color_support quote Color support GIMP also has a palette with RGB, HSV, color wheel, CMYK, and mixing modes, plus tools to pick colors from the image with various averaging options. There is support for hexadecimal color codes (as used in HTML). CMYK colors are immediately translated into RGB when used; GIMP does not have any built-in support for CMYK mixtures that cannot be represented in RGB, such as rich blacks, though they can be simulated to a limited extent with third-party add-ons.[citation needed] /quote doesn't sound like native to me... I hope I'm wrong What is CMYK and what is it's significance for NSW Schools? From what I can tell quick google it seems to be related to printing (and possibly PDF) ...this is not important (and possibly the greatest obstacle), to Digital/Electronic literacy. Fancy feature based comparisons of products is usually used as a counter example to disprove a case rather than build a case. Since 2004, Gimp has worked well for me - I routineley use it to manipulate JPG photos for publishing on the web and emailing! Feedback is how do I end up with such small photos fast, friendly webpages? I've been using GIMP for much longer and to great effect.. it's a terrific piece of software but fatally flawed if you want to print seriously. Even using Gutenprint it's a struggle to get the colour right. It's a great pity. I'm not an expert but I believe that the lack of native CMYK is fundamental to the printing problems. It's rather more than a fancy feature. Printing photos and artwork is fundamental to a whole industry (or two). There are other software with colour management (cinepaint comes to mind) but it's nowhere near as easy to use or as sophisticated as Photoshop. It's one area where FOSS has a way to go. I would love someone to tell me I'm wrong. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Backup theory
PS: On a Mac, you can usually take a hard drive out of one machine and put it in another and it will just work. How much tweaking to get the same result on linux/ubuntu? network cards and significantly different disk devices (ie pata, sata, some strange raid) are usually the only hurdle, but also gfx card if you are using X. network cards are usually just a matter of changing the mac address, or some other minor changes gfx is usually just a matter of reconfiguring X, if you are using anything inside the nvidia range, you can change cards without much fuss. hard disk games with /dev/hda /dev/sda /dev/cciss /dev/someotherraidthing are usually just a matter of editing the fstab and rebooting. in this instance setting init=/bin/bash in grub/lilo is your friend. Dean -- http://fragfest.com.au -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
david wrote: snip I'm not an expert but I believe that the lack of native CMYK is fundamental to the printing problems. It's rather more than a fancy feature. Printing photos and artwork is fundamental to a whole industry (or two). There are other software with colour management (cinepaint comes to mind) but it's nowhere near as easy to use or as sophisticated as Photoshop. It's one area where FOSS has a way to go. I would love someone to tell me I'm wrong. So, the school kids are being taught to develop content for four colour industrial printing, rather than websites? Personally, I would think that school kids and FOSS developers time is better spent improving tools and adding to content in the online world. What really erks me, is that no doubt a PDF newsletters will be produced and emailed around to be printed on home and school printers (no commercial printer in sight). - Tell me I'm wrong. Marghanita -- Marghanita da Cruz http://www.ramin.com.au Phone: (+61)0414 869202 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Backup theory
david da...@kenpro.com.au writes: Daniel Pittman wrote: david da...@kenpro.com.au writes: I've got the following: 2 x servers - single small hard drives in each 1 x desktop - four hard drives including one removeable drive in a caddy intended solely for back up purposes. [...] What's the current best practice for back up in this kind of situation? It varies. Personally, I take advantage of the fact that a Linux system has no magic metadata, so a copy of all the files is enough to perform a bare-metal restore. So this suggests to me that I could make a # cp -a of my root/boot drive onto an empty drive which I then remove and take off-site, rsync'ing it periodically? Yes, that would be sufficient to provide a bare metal recovery copy of your system. Or is it necessary to use dd? Absolutely not. Where does the MBR fit into this? Ah. Now, /that/ isn't part of the filesystem image, but is part of the partition, etc part of the recovery process. It is generally[1] sufficient to chroot into the restored system and rerun the grub installer, or use the fix the boot setup option in your rescue system.[2] When I said that Mondo wrapped up some of this nicely, I meant that it captures the partition map, LVM and MD configuration, and handles reinstalling the boot loader after recovery. None of that is strictly /hard/, but it is a set of things to learn how to do, and something most people don't get a lot of practice in. The problem with any back up system is that normally you only find out that it works for sure when you really *need* it to work. *nod* You know the *really* good thing about the widespread availability of virtual machine software? Free bare metal to test recovering systems to. :) Regards, Daniel If you have a full copy of all your data, though, your worst case path is install a new system, copy the data back, so you can't loose /too/ badly. Footnotes: [1] As in, on any sane, modern platform, which definitely includes current Debian and Ubuntu, but doesn't include RHEL 4 and, IIRC, 5 series systems. Unless your hardware is absolutely identical. [2] I keep a grub boot CD in my rescue kit, since it can also be used to reinstall the system, and it can read the existing menu.lst file. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
On Mon, May 18, 2009, Marghanita da Cruz wrote: So, the school kids are being taught to develop content for four colour industrial printing, rather than websites? Personally, I would think that school kids and FOSS developers time is better spent improving tools and adding to content in the online world. What really erks me, is that no doubt a PDF newsletters will be produced and emailed around to be printed on home and school printers (no commercial printer in sight). - Tell me I'm wrong. I'd rather they'd be taught the difference between the two, so hopefully those who are smart enough to get it will have the oppertunity to. Don't dumb stuff down. Kids are smarter than you'd think. And god knows that FOSS developers could do with being exposed to stuff -outside- of the cool+hip FOSS environment(s) today. Adrian -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
Marghanita da Cruz wrote: david wrote: snip I'm not an expert but I believe that the lack of native CMYK is fundamental to the printing problems. It's rather more than a fancy feature. Printing photos and artwork is fundamental to a whole industry (or two). There are other software with colour management (cinepaint comes to mind) but it's nowhere near as easy to use or as sophisticated as Photoshop. It's one area where FOSS has a way to go. I would love someone to tell me I'm wrong. So, the school kids are being taught to develop content for four colour industrial printing, rather than websites? Personally, I would think that school kids and FOSS developers time is better spent improving tools and adding to content in the online world. What really erks me, is that no doubt a PDF newsletters will be produced and emailed around to be printed on home and school printers (no commercial printer in sight). - Tell me I'm wrong. No no - printed on black and white printers :) - colour printing is still too expensive for most schools apart from the mid to high fee range private schools. Fil -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Lenovo wins $150m NSW schools deal or April Fools joke?
Adrian Chadd wrote: On Mon, May 18, 2009, Marghanita da Cruz wrote: So, the school kids are being taught to develop content for four colour industrial printing, rather than websites? Personally, I would think that school kids and FOSS developers time is better spent improving tools and adding to content in the online world. What really erks me, is that no doubt a PDF newsletters will be produced and emailed around to be printed on home and school printers (no commercial printer in sight). - Tell me I'm wrong. I'd rather they'd be taught the difference between the two, so hopefully those who are smart enough to get it will have the oppertunity to. Don't dumb stuff down. Kids are smarter than you'd think. And god knows that FOSS developers could do with being exposed to stuff -outside- of the cool+hip FOSS environment(s) today. Far from limiting the kids chances, I was hoping for the opposite. There is far too much PDF/proprietary and Desktop published content/designed for the printed page, on the web and not enough open accessible (HTML) web content. If the kids are going to be provided with education on all the different formats, discussion about appropriate communication mediums etc, then fine but Comparison with RGB Comparisons between RGB displays and CMYK prints can be difficult, since the color reproduction technologies and properties are so different. A laser or ink-jet printer prints in dots per inch (dpi) which is very different from a computer screen, which displays graphics in pixels per inch (ppi). A computer screen mixes shades of red, green, and blue to create color pictures. A CMYK printer must compete with the many shades of RGB with only one shade each of cyan, magenta and yellow, which it will mix using dithering, halftoning or some other optical technique; this dithering produces a lower level of detail than the printer's dpi suggests. http://en.wikipedia.org/wiki/CMYK It would also appear introducing CMYK images to the web adds further problems ... see the discussion here: http://newsgroups.derkeiler.com/Archive/Comp/comp.graphics.apps.photoshop/2006-03/msg00067.html Perhaps, in 12 months time we could do a survey and see how many kids laptops have the gimp on them or whether the school websites are full of PDF documents. I know, I might be a lone voice here, but I see it as atonement for once recommending standisation on MSOffice in 1989 because it was the most userfriendly - at the time, it wasn't as good as ?? for footnotes, or as good as ?? for table of contents and Excel just couldn't handle the data that Lotus123 could. On the other hand, I was never a fan of Lotus Notes...and it would seem that's been given away now Welcome to OpenNTF.org OpenNTF is devoted to enabling groups of individuals all over the world to collaborate on IBM Lotus Notes/Domino applications and release them as open source. http://www.openntf.org/Internal/home.nsf Marghanita -- Marghanita da Cruz http://www.ramin.com.au Phone: (+61)0414 869202 -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
