Re: [gentoo-user] Libpng warning
Fernando Antunes wrote: Hi. I've been receiving a linpng warnong on my console saying that something like Application build with libpng.1.2.8 running with libpng.1.5.4. Somebody knows how to identify which application is that ? Have you ran revdep-rebuild recently? That should pick up what package it is and emerge it again using the newer libpng. If not, you could try equery d libpng.1.2.8 which I'm not sure will work but worth a try. I'm sure someone else will come along with other ideas too. As usual, there could be more than one way to fix this. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
Re: [gentoo-user] new machine : Python calculator
120919 Marc Joliet wrote: 120918 Philip Webb purs...@ca.inter.net wrote: With Python running as interpreter, I would get much more capability, but I would need to enter the special line to load the math functions : is it possible to do it with some capitalised variable in .bashrc , which might list parameters telling Python3 what to load when it starts ? one of the 'man' files seems to refer to something like that, but briefly. 3.) Put the import line in its own file and put it in the variable PYTHONSTARTUP, e.g. export PYTHONSTARTUP=/path/to/my/script.py. Python executes it's contents before presenting the prompt, so you can put whatever imports you want in that script. Thanks, that's what I saw in my brief glance at the 'man'. It works out of the box: the only problem is precision, which at 16 decimal places is a bit more than I usually need (smile). I can search out how to limit it to something more useful to me, but might you have a quick answer ? Thanks for the above. -- ,, SUPPORT ___//___, Philip Webb ELECTRIC /] [] [] [] [] []| Cities Centre, University of Toronto TRANSIT`-O--O---' purslowatchassdotutorontodotca
Re: [gentoo-user] new machine : suddenly Python 3 appears
On Wed, Sep 19, 2012 at 09:08:52AM +0200, Penguin Lover Marc Joliet squawked: 2.) The full blown interactive solution: IPython. You can create a session and configure which modules you want preloaded via startup scripts. This is overkill for what you want, I think, but IPython is a much nicer interactive Python interpreter than python itself. For instance, you can reuse previous outputs, e.g. Out[2], to get the output from the third command you entered (indexing starts at 0). Inputs can be similarly recalled by referencing In[i]. Yes, I recommend ipython too. 3.) Put the import line in its own file and put it in the variable PYTHONSTARTUP, e.g. export PYTHONSTARTUP=/path/to/my/script.py. Python executes it's contents before presenting the prompt, so you can put whatever imports you want in that script. It's simple, and if the python interpreter is enough for you, then I'd go with this. There are probably more possibilities, but this is what I can think of right now. Unless you want to load the math module every single time you start Python, it is perhaps better to create an alias (say, python-calc) in bash (or shell of your choice) using the `-i' option of python like alias python-calc='python -i loadmath.py' or if you only need one single command alias python-calc='python -i -c from math import *' which will give you an interactive session with the math functions preloaded. Cheers, W -- Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire et vice versa ~~~ I. Newton
[gentoo-user] Recreating a directory structure and indicating a files presence
Hi all, I have the situation where I have a large amount of data, many TB's, made up of many, many files. This information has now been archived but I've got people who want to be able to see what data does/does not exist, filling in gaps where they may exist. As this data used to be available/visible in a directory structure, ie via a file browser, I thought the easiest way for them to see if something existed would be to create a mirror of the directory structure and then populate this dir structure with 1 - 5 byte files with the same name as the real data files that now reside in the archive. I've seen some scripts on the interweb that allow me to create the dir structure, but does anyone have any ideas how to do the creation of the marker files in the active file system? Just buying more hard disks and keeping the data on line also isn't an option. Any thoughts, greatly appreciated, Andrew
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Thu, 20 Sep 2012 20:33:39 +0800 Andrew Lowe a...@wht.com.au wrote: Hi all, I have the situation where I have a large amount of data, many TB's, made up of many, many files. This information has now been archived but I've got people who want to be able to see what data does/does not exist, filling in gaps where they may exist. As this data used to be available/visible in a directory structure, ie via a file browser, I thought the easiest way for them to see if something existed would be to create a mirror of the directory structure and then populate this dir structure with 1 - 5 byte files with the same name as the real data files that now reside in the archive. I've seen some scripts on the interweb that allow me to create the dir structure, but does anyone have any ideas how to do the creation of the marker files in the active file system? Just buying more hard disks and keeping the data on line also isn't an option. Any thoughts, greatly appreciated, Andrew I don't understand why you specify 1-5 byte files. Those few bytes will always be useless. Rather use 0-length files. On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt Copy those two files to the on-line system: for I in `cat dirs.txt` ; do mkdir -p $I ; done for I in `cat files.txt` ; do touch -p $I ; done Do that in the appropriate top-level directory of course. You can probably make it more efficient using decent options to xargs, but what the hell, I'd do it as-is. It's a once off action and finding the xargs man page will take longer than the mkdirs -- Alan McKinnon alan.mckin...@gmail.com
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote: On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt This will add '/root/of/dir/structure' to the start of each path. would it be better to do? cd /root/of/dir/structure find -type d ../dirs.txt find -type f ../files.txt -- Neil Bothwick All generalizations are false. signature.asc Description: PGP signature
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Thu, Sep 20, 2012 at 10:48 AM, Neil Bothwick n...@digimed.co.uk wrote: On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote: On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt This will add '/root/of/dir/structure' to the start of each path. would it be better to do? cd /root/of/dir/structure find -type d ../dirs.txt find -type f ../files.txt I see your path correction, and raise you: * whitespace-safe folders * Automatic copy to remote system. * Automatic new file and folder creation * Using those pretty xargs parameters. cd /root/of/dir/structure find . -type d -print0 ~/dirs.txt find . -type d -print0 ~/files.txt scp dirs.txt files.txt remote.system: ssh remote.system ENDSSH cd /root/of/new/structure cat ~/dirs.txt|xargs -0 mkdir -p cat ~/files.txt|xargs -0 touch ENDSSH -- :wq
Re: [gentoo-user] Re: Reinstall + switch to KDE
On Mon, 10 Sep 2012 14:44:33 -0500 Canek Peláez Valdés can...@gmail.com wrote: On Mon, Sep 10, 2012 at 2:36 PM, Alan McKinnon alan.mckin...@gmail.com wrote: On Mon, 10 Sep 2012 12:53:41 -0400 Andrey Moshbear andrey@gmail.com wrote: On Mon, Sep 10, 2012 at 12:43 PM, Nikos Chantziaras rea...@gmail.com wrote: On 10/09/12 19:12, Samuraiii wrote: Hello, because I broke me PC and I need to reinstall it I'm going ask what should I preserve to make install faster: So what *is* broken? The hardware? If you have a new PC, you simply need to transfer your Gentoo install to a new hard disk using rsync. He borked his /usr/include due to an improperly-written uninstall rule in a Makefile. if emerge -e world runs, it will fix that little oopsie No, it won't; if enough files from /usr/include are gone/borked, most packages will fail compilation. glibc alone has ~450 files under /usr/include; and basically everything depends on glibc. hmm, my approach in that case would be to get /usr from a recent stage3 tarball and then running emerge -e world but maybe there is a reason why nobody came up with that already :-/ --
Re: [gentoo-user] Gentoo is the best linux distro
On Wed, 12 Sep 2012 16:55:37 +0200 Alan McKinnon alan.mckin...@gmail.com wrote: lafilefixer --justfixit. The last one, lafilefixer --justfixit is especially valuable as it gets right of a huge gigantic steaming pile of crap that a) should never have been there at all in the first place and b) if it's causing the problem is almost impossible to pin down without lots of work. So even if b) is not true, you still get the huge benefit of a) while we are at it… does it still make sense to run it on a regular basis or can I purge it from my maintenace script?e
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Sep 20, 2012 10:04 PM, Michael Mol mike...@gmail.com wrote: On Thu, Sep 20, 2012 at 10:48 AM, Neil Bothwick n...@digimed.co.uk wrote: On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote: On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt This will add '/root/of/dir/structure' to the start of each path. would it be better to do? cd /root/of/dir/structure find -type d ../dirs.txt find -type f ../files.txt I see your path correction, and raise you: * whitespace-safe folders * Automatic copy to remote system. * Automatic new file and folder creation * Using those pretty xargs parameters. cd /root/of/dir/structure find . -type d -print0 ~/dirs.txt find . -type d -print0 ~/files.txt scp dirs.txt files.txt remote.system: ssh remote.system ENDSSH cd /root/of/new/structure cat ~/dirs.txt|xargs -0 mkdir -p cat ~/files.txt|xargs -0 touch ENDSSH Cool... except that your raise is invalid (should've used -type f in the 3rd line)... ;-) Rgds,
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Thu, Sep 20, 2012 at 11:54 AM, Pandu Poluan pa...@poluan.info wrote: On Sep 20, 2012 10:04 PM, Michael Mol mike...@gmail.com wrote: On Thu, Sep 20, 2012 at 10:48 AM, Neil Bothwick n...@digimed.co.uk wrote: On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote: On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt This will add '/root/of/dir/structure' to the start of each path. would it be better to do? cd /root/of/dir/structure find -type d ../dirs.txt find -type f ../files.txt I see your path correction, and raise you: * whitespace-safe folders * Automatic copy to remote system. * Automatic new file and folder creation * Using those pretty xargs parameters. cd /root/of/dir/structure find . -type d -print0 ~/dirs.txt find . -type d -print0 ~/files.txt scp dirs.txt files.txt remote.system: ssh remote.system ENDSSH cd /root/of/new/structure cat ~/dirs.txt|xargs -0 mkdir -p cat ~/files.txt|xargs -0 touch ENDSSH Cool... except that your raise is invalid (should've used -type f in the 3rd line)... ;-) Heh. It's also performing a bunch of unnecessary mkdir commands. I mean, find -type d isn't going to return a subpath of a folder until it's first returned the folder, so -p is unnecessary. For a better speed gain, you'd want to keep -p, but filter out any folder which has a subfolder, to reduce the number of mkdir commands issued. It's possible mkdir performs this optimization internally, though. And I don't know how to quickly do that filter on the command line. -- :wq
Re: [gentoo-user] Recreating a directory structure and indicating a files presence
On Thu, Sep 20, 2012 at 12:04 PM, Michael Mol mike...@gmail.com wrote: On Thu, Sep 20, 2012 at 11:54 AM, Pandu Poluan pa...@poluan.info wrote: On Sep 20, 2012 10:04 PM, Michael Mol mike...@gmail.com wrote: On Thu, Sep 20, 2012 at 10:48 AM, Neil Bothwick n...@digimed.co.uk wrote: On Thu, 20 Sep 2012 16:13:08 +0200, Alan McKinnon wrote: On the archive: find /root/of/dir/structure -type d dirs.txt find /root/of/dir/structure -type f files.txt This will add '/root/of/dir/structure' to the start of each path. would it be better to do? cd /root/of/dir/structure find -type d ../dirs.txt find -type f ../files.txt I see your path correction, and raise you: * whitespace-safe folders * Automatic copy to remote system. * Automatic new file and folder creation * Using those pretty xargs parameters. cd /root/of/dir/structure find . -type d -print0 ~/dirs.txt find . -type d -print0 ~/files.txt scp dirs.txt files.txt remote.system: ssh remote.system ENDSSH cd /root/of/new/structure cat ~/dirs.txt|xargs -0 mkdir -p cat ~/files.txt|xargs -0 touch ENDSSH Cool... except that your raise is invalid (should've used -type f in the 3rd line)... ;-) Heh. It's also performing a bunch of unnecessary mkdir commands. I mean, find -type d isn't going to return a subpath of a folder until ^^ s/subpath/subfolder/ ^^ -- :wq
Re: [gentoo-user] Gentoo is the best linux distro
Daniel Wagener wrote: On Wed, 12 Sep 2012 16:55:37 +0200 Alan McKinnon alan.mckin...@gmail.com wrote: lafilefixer --justfixit. The last one, lafilefixer --justfixit is especially valuable as it gets right of a huge gigantic steaming pile of crap that a) should never have been there at all in the first place and b) if it's causing the problem is almost impossible to pin down without lots of work. So even if b) is not true, you still get the huge benefit of a) while we are at it… does it still make sense to run it on a regular basis or can I purge it from my maintenace script?e I think it depends on your version of portage. Older portage versions needs you to run it and newer versions I think have it built into portage or another way to fix this. You may want to post what version of portage you are using to get a more accurate answer. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
Re: [gentoo-user] Re: Reinstall + switch to KDE
On Thu, 20 Sep 2012 07:44:13 +0200 Daniel Wagener st...@gmx.net wrote: On Mon, 10 Sep 2012 14:44:33 -0500 Canek Peláez Valdés can...@gmail.com wrote: On Mon, Sep 10, 2012 at 2:36 PM, Alan McKinnon alan.mckin...@gmail.com wrote: On Mon, 10 Sep 2012 12:53:41 -0400 Andrey Moshbear andrey@gmail.com wrote: On Mon, Sep 10, 2012 at 12:43 PM, Nikos Chantziaras rea...@gmail.com wrote: On 10/09/12 19:12, Samuraiii wrote: Hello, because I broke me PC and I need to reinstall it I'm going ask what should I preserve to make install faster: So what *is* broken? The hardware? If you have a new PC, you simply need to transfer your Gentoo install to a new hard disk using rsync. He borked his /usr/include due to an improperly-written uninstall rule in a Makefile. if emerge -e world runs, it will fix that little oopsie No, it won't; if enough files from /usr/include are gone/borked, most packages will fail compilation. glibc alone has ~450 files under /usr/include; and basically everything depends on glibc. hmm, my approach in that case would be to get /usr from a recent stage3 tarball and then running emerge -e world but maybe there is a reason why nobody came up with that already :-/ But that would be too easy, no wonder no-one mentioned it :-) It probably is the right thing to do though. You don;t actually know every package that's affected, and no easy way to find out and no way to find false negatives. So the correct approach is to realize that a complete rebuild finishes in a reasonable time, and then do it. -- Alan McKinnon alan.mckin...@gmail.com
Re: [gentoo-user] new machine : Python calculator
Am Thu, 20 Sep 2012 05:05:11 -0400
schrieb Philip Webb purs...@ca.inter.net:
120919 Marc Joliet wrote:
120918 Philip Webb purs...@ca.inter.net wrote:
With Python running as interpreter, I would get much more capability,
but I would need to enter the special line to load the math functions :
is it possible to do it with some capitalised variable in .bashrc ,
which might list parameters telling Python3 what to load when it starts ?
one of the 'man' files seems to refer to something like that, but briefly.
3.) Put the import line in its own file and put it in the variable
PYTHONSTARTUP, e.g. export PYTHONSTARTUP=/path/to/my/script.py.
Python executes it's contents before presenting the prompt,
so you can put whatever imports you want in that script.
Thanks, that's what I saw in my brief glance at the 'man'.
It works out of the box: the only problem is precision,
which at 16 decimal places is a bit more than I usually need (smile).
I can search out how to limit it to something more useful to me,
but might you have a quick answer ? Thanks for the above.
Reading up the format specification mini language
(http://docs.python.org/library/string.html#formatspec, and the format syntax
explained above it), you could do as follows, to print as float rounded to four
decimal places:
print('{0:.4f}'.format(2.4))
Or, leaving out the zero (you only need the indexes if you print things out of
order or multiple times):
print('{:.4f}'.format(2.4))
Also, I re-remembered that there is an alternative formatting method (I don't
print formatted output that often in python, I guess):
print(%.4f % 2.4)
will do the same as the above two examples. Either way, to make things easy,
you could define your own print function to do that for you, e.g.:
def myprint(num, places=4, *args, **kargs):
fmt_str = {:. + str(places) + f}
print(fmt_str.format(num), *args, **kargs)
Using it would look like (in IPython):
In [13]: myprint(2.4)
2.4000
In [14]: myprint(2.4, 5)
2.4
You would put this in the startup script after the import line. Note that it
passes extra positional and keyword arguments to print(), so you can specify a
file to print to, for example. Also note that because of this, it won't work in
Python 2.
HTH
--
Marc Joliet
--
People who think they know everything really annoy those of us who know we
don't - Bjarne Stroustrup
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Description: PGP signature
Re: [gentoo-user] new machine : suddenly Python 3 appears
Am Thu, 20 Sep 2012 13:38:45 +0200 schrieb Willie WY Wong wong...@member.ams.org: On Wed, Sep 19, 2012 at 09:08:52AM +0200, Penguin Lover Marc Joliet squawked: 2.) The full blown interactive solution: IPython. You can create a session and configure which modules you want preloaded via startup scripts. This is overkill for what you want, I think, but IPython is a much nicer interactive Python interpreter than python itself. For instance, you can reuse previous outputs, e.g. Out[2], to get the output from the third command you entered (indexing starts at 0). Inputs can be similarly recalled by referencing In[i]. Yes, I recommend ipython too. 3.) Put the import line in its own file and put it in the variable PYTHONSTARTUP, e.g. export PYTHONSTARTUP=/path/to/my/script.py. Python executes it's contents before presenting the prompt, so you can put whatever imports you want in that script. It's simple, and if the python interpreter is enough for you, then I'd go with this. There are probably more possibilities, but this is what I can think of right now. Unless you want to load the math module every single time you start Python, it is perhaps better to create an alias (say, python-calc) in bash (or shell of your choice) using the `-i' option of python like alias python-calc='python -i loadmath.py' or if you only need one single command alias python-calc='python -i -c from math import *' which will give you an interactive session with the math functions preloaded. You are right, exporting PYTHONSTARTUP globally for something like this in the bashrc would in this case be stupid, or at least wasteful. I like your alias version better :) . Cheers, W Greetings -- Marc Joliet -- People who think they know everything really annoy those of us who know we don't - Bjarne Stroustrup signature.asc Description: PGP signature
Re: [gentoo-user] new machine : Python calculator
[...]
def myprint(num, places=4, *args, **kargs):
fmt_str = {:. + str(places) + f}
print(fmt_str.format(num), *args, **kargs)
OK, quick update because I just realised how weird it is to have positional
arguments after a (potential) keyword argument (I really should go to bed).
Either of these is better:
# places is exclusively a keyword argument now
def myprint(num, *args, places=4, **kargs):
fmt_str = {:. + str(places) + f}
print(fmt_str.format(num), *args, **kargs)
# doesn't support extra arguments to print(), but is simpler
def myprint(num, places=4):
fmt_str = {:. + str(places) + f}
print(fmt_str.format(num))
--
Marc Joliet
--
People who think they know everything really annoy those of us who know we
don't - Bjarne Stroustrup
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Description: PGP signature
Re: [gentoo-user] Re: Reinstall + switch to KDE
On Thu, 2012-09-20 at 18:20 +0200, Alan McKinnon wrote: On Thu, 20 Sep 2012 07:44:13 +0200 Daniel Wagener st...@gmx.net wrote: On Mon, 10 Sep 2012 14:44:33 -0500 Canek Peláez Valdés can...@gmail.com wrote: On Mon, Sep 10, 2012 at 2:36 PM, Alan McKinnon alan.mckin...@gmail.com wrote: On Mon, 10 Sep 2012 12:53:41 -0400 Andrey Moshbear andrey@gmail.com wrote: On Mon, Sep 10, 2012 at 12:43 PM, Nikos Chantziaras rea...@gmail.com wrote: On 10/09/12 19:12, Samuraiii wrote: Hello, because I broke me PC and I need to reinstall it I'm going ask what should I preserve to make install faster: So what *is* broken? The hardware? If you have a new PC, you simply need to transfer your Gentoo install to a new hard disk using rsync. He borked his /usr/include due to an improperly-written uninstall rule in a Makefile. if emerge -e world runs, it will fix that little oopsie No, it won't; if enough files from /usr/include are gone/borked, most packages will fail compilation. glibc alone has ~450 files under /usr/include; and basically everything depends on glibc. hmm, my approach in that case would be to get /usr from a recent stage3 tarball and then running emerge -e world but maybe there is a reason why nobody came up with that already :-/ But that would be too easy, no wonder no-one mentioned it :-) It probably is the right thing to do though. You don;t actually know every package that's affected, and no easy way to find out and no way to find false negatives. ... equery check pkgname BillK
Re: [gentoo-user] Libpng warning
On Thu, Sep 20, 2012 at 3:42 AM, Dale rdalek1...@gmail.com wrote: Fernando Antunes wrote: Hi. I've been receiving a linpng warnong on my console saying that something like Application build with libpng.1.2.8 running with libpng.1.5.4. Somebody knows how to identify which application is that ? Have you ran revdep-rebuild recently? That should pick up what package it is and emerge it again using the newer libpng. Yes I had it, but no error. If not, you could try equery d libpng.1.2.8 which I'm not sure will work but worth a try. Did not show anything. I'm sure someone else will come along with other ideas too. As usual, there could be more than one way to fix this. I hope so. Dale :-) :-) -- I am only responsible for what I said ... Not for what you understood or how you interpreted my words!
[gentoo-user] Comparing kernel configurations...
Hi, are there any tools beside diff, vimdiff, kdiff3 and such which supports one in comparing two differen .config from the linux kernel? Thank your very much for any help in advance! Have a nice weekend! Best regards, mcc
Re: [gentoo-user] Comparing kernel configurations...
meino.cra...@gmx.de writes: Hi, are there any tools beside diff, vimdiff, kdiff3 and such which supports one in comparing two differen .config from the linux kernel? Just copy your .config to new kernel directory and make oldconfig. The newly added and changed option will prompt, verify them carefully. Thank your very much for any help in advance! Have a nice weekend! Best regards, mcc -- wenpin cui
Re: [gentoo-user] Re: virtualbox - serial port
On Tuesday 18 Sep 2012 18:49:33 Joseph wrote: On 09/18/12 15:59, Grant Edwards wrote: [snip] I'm in group tty, so I can not figure it out why virtualbox is complaining. What happens when you do cat /dev/ttyS0? It is working know. It was my error :-/ I had it selected host pipe and it should be host device' One of those days :-) Mine looks like this: $ ls -l /dev/ttyS0 crw-rw 1 root uucp 4, 64 Sep 21 06:16 /dev/ttyS0 and the user (me) is a member of the uucp group. Not sure if this is a more correct way to configure it ... -- Regards, Mick signature.asc Description: This is a digitally signed message part.
