Re: [gentoo-user] to nest commands
On Mon, Nov 25, 2013 at 11:45:39PM -0800, edwardu...@live.com wrote: On Tue, 26 Nov 2013 01:16:45 +0200 Alan McKinnon alan.mckin...@gmail.com wrote: You don't do it that way. I understand what you want to do, but your description makes no sense. How you do it is by running two commands on one line, one after the other. To copy a file myfile.txt to /tmp and also change it's permissions, use the ; separator: cp myfile.txt /tmp ; chmod 644 /tmp/myfile.txt That runs the first command (cp) and then blindly runs the second one. Sometimes you want to run the second command only if the first one succeeds (there's not much point in chmod'ing a file that didn't copy properly. does this: cp myfile.txt /tmp chmod 644 /tmp/myfile.txt is boolean logic and a very common programming trick. I won't bore you with details - it gets complex and we'd have to deal with brash crazies like why true and false is the wrong way round the the rest of the world, but just know it this way: the second command (chmod) will only run if the first (cp) succeeded. If it failed, the chmod will not be be tried. Note that is definitely not the same thing as just one - that is something completely different. Bash is full of such stuff, it's all done deliberately to mess with your head :-) Thanks for the prompt reply and free lesson, I appreciate it:-) Yes...this is exactly what I was looking for. There are some other options of nesting as well. You can use backticks ` or $(...) to run a command inside another. An example would be emerge `qlist -CI x11-drivers` (or the equivalent emerge $(qlist -CI x11-drivers) ) . This would run qlist -CI x11-drivers (lists installed packages of the category x11-drivers) and use this output for emerge (which will effectively result in reinstalling every package from the x11-drivers category). WKR Hinnerk signature.asc Description: Digital signature
Re: [gentoo-user] Terminals not closing after exit anymore
Zitat von Peter Weilbacher newss...@weilbacher.org: Don't have Mate, but I can otherwise confirm this behavior: xfce terminal works, gnome-terminal does weird things. One more thing that happens to me is that apparently gnome-terminal does not notify console apps of new window size. For me this happens to Alpine. (The only reason why I didn't simply switch to xfce terminal is that there I cannot switch off the scrollbar with parameters.) Well I've found one possibility for that strange behaviour could be the proprietary Nvidia driver. There's already some bug open in the Gentoo Bugtracker. Downgraded from 331 to 319, but it did not really change at all, so still diggin'!
Re: [gentoo-user] Terminals not closing after exit anymore
Marc Stürmer wrote: Zitat von Peter Weilbacher newss...@weilbacher.org: Don't have Mate, but I can otherwise confirm this behavior: xfce terminal works, gnome-terminal does weird things. One more thing that happens to me is that apparently gnome-terminal does not notify console apps of new window size. For me this happens to Alpine. (The only reason why I didn't simply switch to xfce terminal is that there I cannot switch off the scrollbar with parameters.) Well I've found one possibility for that strange behaviour could be the proprietary Nvidia driver. There's already some bug open in the Gentoo Bugtracker. Downgraded from 331 to 319, but it did not really change at all, so still diggin'! I have found this one to be the most stable driver. x11-drivers/nvidia-drivers-304.116 You may want to give it a shot. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
Re: [gentoo-user] Terminals not closing after exit anymore
Zitat von Dale rdalek1...@gmail.com: I have found this one to be the most stable driver. x11-drivers/nvidia-drivers-304.116 I am going to give it a shot when I am back home on my own computer.
Re: [gentoo-user] Terminals not closing after exit anymore
Marc Stürmer wrote: Zitat von Dale rdalek1...@gmail.com: I have found this one to be the most stable driver. x11-drivers/nvidia-drivers-304.116 I am going to give it a shot when I am back home on my own computer. These are the ones I have tried but they have issues. [-P-] [M ] x11-drivers/nvidia-drivers-310.51:0 [-P-] [M ] x11-drivers/nvidia-drivers-313.30:0 [-P-] [M ] x11-drivers/nvidia-drivers-319.49:0 [-P-] [M ] x11-drivers/nvidia-drivers-319.60:0 [-P-] [M ] x11-drivers/nvidia-drivers-325.15:0 [-P-] [M ] x11-drivers/nvidia-drivers-331.20:0 Each time I try a new one and it doesn't work, I mask it. It's been a while. Since you found a bug report, maybe they will fix it soon. Maybe. Oh, it seems to get worse with each new version too. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
Re: [gentoo-user] Re: Weird graphical glitches after world update
walt wrote: On 11/21/2013 01:38 PM, Dale wrote: Alan McKinnon wrote: On 21/11/2013 17:10, Mateusz Kowalczyk wrote: Greetings, I spent a chunk of yesterday updating world on my machines (2 file servers and 1 netbook) and with some effort, the updates went through. I had to go out today so I rebooted my netbook and I started noticing weird graphical glitches in certain applications, as if parts of the screen weren't updating, namely in urxvt and emacs. In urxvt, my shell prompt seems to not render the cursor and often keeps the letters I remove still on the prompt (only graphically, they aren't actually there). This is extremely annoying. It's also terrible in emacs: cursor sometimes doesn't get rendered and I get tons of artefacts from different buffers when I switch or from text I was editing. You can find an example image of such glitches in emacs at [1]. This is absolutely tragic for me as I spend majority of my time in emacs. I'd like to note that I'm running emacs in a graphical frame and not in a terminal. A quick note to say that you are not alone, I get this as well since about 6 weeks ago (a ~amd system). So it's not something you and just you managed to do, I got it as well. In my case it's as if the system's idea of what is on the screen is off by one row of pixels. I get a stray row of dots at the top of lines that correspond to the risers of glyphs on the previous line, and new underscores don't show up until I enter a newline. This is a mostly KDE system using konsole, so it's not the terminal emulator or editor that's the root cause. Some may recall I have posted about similar issues in the past. Heck, I still do when I upgrade the drivers. I'm stuck using a older driver but still run into the issue every once in a while. The biggest giveaway for me is that my clock is stuck. I have mine set to show seconds and it either stops or the time sort of jumps several seconds at a time. It's weird but as Alan said, it is not just you. You got plenty of company on this one. One other possibility is that xorg updated something that broke some video drivers. Maybe qlop -l xorg would give you a hint about when your video problem first appeared? In my case, it is the video drivers. On another thread, someone else has ran into a similar issue. Also, I am one of those that does a emerge -e world when in doubt. Sometimes that works. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
[gentoo-user] Re: {OT} video monitoring
Grant emailgrant at gmail.com writes: I've been using motion along with USB cameras for a while. I need to expand my monitoring capacity and I'm wondering if I should consider changing software or hardware. motion seems fairly dead but is stable. I'm reading conflicting info about the current status of zoneminder. Is anyone using IP cams? Hello Grant, Some years ago, the slickest webserver plus zoneminder setup was this http://www.gossamer-threads.com/lists/cherokee/users/2450 cherokee + zoneminder + php Another solution is to get some pci cards that take a coax input from a coax cable (RG/59 or RG6 for distance) directly into the PC. There you can convert the streaming video into h.264 and move it around the ethernet. Encoder (coax to h.264) pci cards use to abound such as Qsee, Avermedia etc etc. You can also get embedded boards from TI that include the DaVinci package which take in coax and convert it to H.264. I use to get the best information about the key chips reading the linux kernel driver documentation found in the old drivers. Many of the drivers (most?) have been unified and the in-driver documents therein will be mostly useless, so old 2.4 and 2.6 drivers for specific chipsets is the best source, if you really want to dig into video over IP. Most currently manufactured IP cams go to great links to make their hardware a black box on what they are doing to output the H.264. [2] Furthermore, you have to delve in the container versus the packets when you find incompatibilities. Many of the advanced ethernet sniffing software packages have h.264 filters build in [1]. It's all H.264, just a lot of software gymnastics to frustrate folks from rolling their own video solution. If I were to get serious about video/IP, I'd go with VP8 (google's standard) and find a codec (opensource) that could be put on a micro processor board; pandaboard? [3]. Googling around and I'm sure you can find something. [4] usb video sucks, once you try to scale up for any sort of serious video surveillance system; imho. hth, James [1] http://www.wireshark.org/docs/dfref/h/h264.html [2] http://en.wikipedia.org/wiki/VP8 [3] https://wiki.linaro.org/WorkingGroups/Middleware/ Multimedia/Specs/1105/OptimizeVp8Decoding [4] http://www.webmproject.org/tools/
Re: [gentoo-user] to nest commands
On Tue, 26 Nov 2013 11:52:10 +0100 Hinnerk van Bruinehsen h.v.bruineh...@fu-berlin.de wrote: There are some other options of nesting as well. You can use backticks ` or $(...) to run a command inside another. An example would be emerge `qlist -CI x11-drivers` (or the equivalent emerge $(qlist -CI x11-drivers) ) . This would run qlist -CI x11-drivers (lists installed packages of the category x11-drivers) and use this output for emerge (which will effectively result in reinstalling every package from the x11-drivers category). As I understand it, the $(...) syntax is the preferred way of nesting, as opposed to backticks. I think this may be due to backticks requiring some special escaping that the $(...) syntax does not require. I attempted a brief search for supporting information, but didn't find a definitive source to back up my claims :) signature.asc Description: PGP signature
Re: [gentoo-user] to nest commands
On Tue, 26 Nov 2013 09:58:24 -0500 Randy Barlow wrote: On Tue, 26 Nov 2013 11:52:10 +0100 Hinnerk van Bruinehsen h.v.bruineh...@fu-berlin.de wrote: There are some other options of nesting as well. You can use backticks ` or $(...) to run a command inside another. An example would be emerge `qlist -CI x11-drivers` (or the equivalent emerge $(qlist -CI x11-drivers) ) . This would run qlist -CI x11-drivers (lists installed packages of the category x11-drivers) and use this output for emerge (which will effectively result in reinstalling every package from the x11-drivers category). As I understand it, the $(...) syntax is the preferred way of nesting, as opposed to backticks. I think this may be due to backticks requiring some special escaping that the $(...) syntax does not require. I attempted a brief search for supporting information, but didn't find a definitive source to back up my claims :) The reason for $(...) being preferred is simple: you can nest $($($(...))), but you can't nest `...`. Deep nesting is quite useful indeed. Best regards, Andrew Savchenko pgpv4whI_T8sT.pgp Description: PGP signature
Re: [gentoo-user] to nest commands
On Tue, 26 Nov 2013 19:12:40 +0400, Andrew Savchenko wrote: As I understand it, the $(...) syntax is the preferred way of nesting, as opposed to backticks. I think this may be due to backticks requiring some special escaping that the $(...) syntax does not require. I attempted a brief search for supporting information, but didn't find a definitive source to back up my claims :) The reason for $(...) being preferred is simple: you can nest $($($(...))), but you can't nest `...`. Deep nesting is quite useful indeed. The other reason is that $(...) is so much more readable. You can nest backticks but the escaping used is such a mess that even Perl programmers would hesitate to use it. -- Neil Bothwick Guillotine operator wanted. Chance to get ahead. signature.asc Description: PGP signature
Re: [gentoo-user] Terminals not closing after exit anymore
On 2013-11-26 13:20, Marc Stürmer wrote: Zitat von Peter Weilbacher newss...@weilbacher.org: One more thing that happens to me is that apparently gnome-terminal does not notify console apps of new window size. For me this happens to Alpine. (The only reason why I didn't simply switch to xfce terminal is that there I cannot switch off the scrollbar with parameters.) Well I've found one possibility for that strange behaviour could be the proprietary Nvidia driver. There's already some bug open in the Gentoo Bugtracker. Downgraded from 331 to 319, but it did not really change at all, so still diggin'! Yes, my Alpine-related problem was solved by downgrading the NVidia driver from 331.20 to 331.17. The problem with the terminals that don't want to close on Ctrl-D stays the same. (I also tried 331.13 but that didn't help. And the problem started to appear after Oct 7th for me which is when I installed 331.13.) Peter.
[gentoo-user] Re: to nest commands
On 2013-11-26, Randy Barlow ra...@electronsweatshop.com wrote: On Tue, 26 Nov 2013 11:52:10 +0100 Hinnerk van Bruinehsen h.v.bruineh...@fu-berlin.de wrote: There are some other options of nesting as well. You can use backticks ` or $(...) to run a command inside another. An example would be emerge `qlist -CI x11-drivers` (or the equivalent emerge $(qlist -CI x11-drivers) ) . This would run qlist -CI x11-drivers (lists installed packages of the category x11-drivers) and use this output for emerge (which will effectively result in reinstalling every package from the x11-drivers category). As I understand it, the $(...) syntax is the preferred way of nesting, as opposed to backticks. I think this may be due to backticks requiring some special escaping that the $(...) syntax does not require. AFAIK, it's entirely for readability. In some fonts, it's almost impossible to tell back tics from forward tics. And at some eyeball ages it's possible to completely miss both when reading quickly... -- Grant Edwards grant.b.edwardsYow! Let's all show human at CONCERN for REVERAND MOON's gmail.comlegal difficulties!!
[gentoo-user] Re: to nest commands
edwardunix at live.com edwardunix at live.com writes: My Bash skills are not that advanced, http://en.wikibooks.org/wiki/Bash_Shell_Scripting Also, loop nesting and recursion seem similar, but have nuances, depending on the language and what you are trying to do. If you learn about recursion it will help you understand one of the golden keys to coding http://en.wikibooks.org/wiki/Algorithm_Implementation/Sorting/Quicksort#Pseudocode hth, James
[gentoo-user] Newsbeuter - Cannot set element colors
Really weird behavior; I'm just following the documentation: just22@egeo:[~]$ cat ./.newsbeuter/config # Browser command browser dwb %u # Color scheme color background white black but when I try to launch the reader, it complains this way: just22@egeo:[~]$ newsbeuter XDG: configuration directory '/home/just22/.config/newsbeuter' not accessible, using '/home/just22/.newsbeuter' instead. Starting newsbeuter 2.6... Loading configuration...Error while processing command `color background white black' (/home/just22/.newsbeuter/config line 5): too few parameters. I tried also to add optional attributes: just22@egeo:[~]$ cat ./.newsbeuter/config # Browser command browser dwb %u # Color scheme color background white black bold but no luck: just22@egeo:[~]$ newsbeuter XDG: configuration directory '/home/just22/.config/newsbeuter' not accessible, using '/home/just22/.newsbeuter' instead. Starting newsbeuter 2.6... Loading configuration...Error while processing command `color background white black bold' (/home/just22/.newsbeuter/config line 5): `bold' is not a valid color Any hints? -- Alessandro DE LAURENZIS [mailto:just22@gmail.com] LinkedIn: http://it.linkedin.com/in/delaurenzis
Re: [gentoo-user] Re: to nest commands
On Tue, 26 Nov 2013 18:22:31 + (UTC) James wirel...@tampabay.rr.com wrote: http://en.wikibooks.org/wiki/Bash_Shell_Scripting Also, loop nesting and recursion seem similar, but have nuances, depending on the language and what you are trying to do. If you learn about recursion it will help you understand one of the golden keys to coding http://en.wikibooks.org/wiki/Algorithm_Implementation/Sorting/Quicksort#Pseudocode Thanks everybody for replying:-) I will try the different methods i was presented and will read the the material from from wikibooks alone with the other reading stuff I'm reading. Thanks again. -- edwardu...@live.com edwardu...@live.com
[gentoo-user] Do I require static nodes?
Hello, Portage recently told me this: * You need to add kmod-static-nodes to the sysinit runlevel for * kernel modules to have required static nodes! * Run this command: * rc-update add kmod-static-nodes sysinit Will you please help me parse this statement? Interpretation A: * You need to add kmod-static-nodes to the sysinit runlevel Interpretation B: * If your kernel modules require static nodes, then you need to add * kmod-static-nodes to the sysinit runlevel Q1: Is it A or B (or C...)? Q2: If it's B, then how do I determine whether or not my kernel modules require static nodes? Thank you, Chris
[gentoo-user] Fusion-IO Experience?
Hello list! My company's considering of purchasing a couple of Fusion-IO [1] devices, especially the ioDrive Octal model [2]. However, before we actually commit to purchasing it, I'd like to gather some info first. Have any of you had any experience with a Fusion-IO product? Not necessarily the same model. Do you have difficulties running Linux on top of it? (We don't actually plan to *boot* from it; most likely the system will boot from a RAID-1 array of SSDs). Did anyone successfully run it with Gentoo? Any inputs will be very appreciated. [1] http://www.fusionio.com [2] http://www.fusionio.com/products/iodrive-octal/ Rgds, -- FdS Pandu E Poluan ~ IT Optimizer ~ • LOPSA Member #15248 • Blog : http://pandu.poluan.info/blog/ • Linked-In : http://id.linkedin.com/in/pepoluan
