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  • cut text from each line in a txt file

    - by bboyreason
    i have a text file where each line looks like this: <img border=0 width=555 height=555 src=http://websitelinkimagelinkhere> each line is like that for like 1500 lines, i want to sort of 'grep' (i dont think that will work because it returns the whole line) each line for 'http://websiteimagelinkhere' output file should have newlines or tabs after each image link, like the original file. or if someone only knows a way to do this with each element being in a cell of the same column that would be okay too.

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  • Preserve embedded album art when converting from .flac to .ogg

    - by Profpatsch
    I want to convert my archived .flac library to .ogg for daily use. Using find ./ -iname '*.flac' -print0 | xargs -0 -n1 oggenc -q6 on the root music folder and then deleting every .flac (having copies of them in archive) seems straight forward, after trying it with one file it worked and all of the tags were transfered, too, except for one: Embedded album art! I always prefer emedded covers over folder images, since I have some albums with varying covers. One possible solution is discussed here, but the script only works if the image is already extracted: Embed album art in OGG through command line in linux One possible solution I thought about was extracting album art from every song (not every song has one, though, and some even 2 or 3!), temporarily saving it and then using the script to include it into the finished .ogg. But then I want to increase the number of processes xargs runs simultaniously to save time, so the temp images need to have a distinct name. Is there a (linux) program that knows how to handle this? Or is there a finished script floating around somewhere? It would be nice if oggenc supported adding embedded coverart and it really is a shame, since these two formats should (in theory) share the same tag format. Edit: 15 days and noone even tries to answer. It’s funny, most of my questions don’t get answered. Too hard? Wrong SE site?

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  • Do background processes get a SIGHUP when logging off?

    - by Massimo
    This is a followup to this question. I've run some more tests; looks like it really doesn't matter if this is done at the physical console or via SSH, neither does this happen only with SCP; I also tested it with cat /dev/zero > /dev/null. The behaviour is exactly the same: Start a process in the background using & (or put it in background after it's started using CTRL-Z and bg); this is done without using nohup. Log off. Log on again. The process is still there, running happily, and is now a direct child of init. I can confirm both SCP and CAT quits immediately if sent a SIGHUP; I tested this using kill -HUP. So, it really looks like SIGHUP is not sent upon logoff, at least to background processes (can't test with a foreground one for obvious reasons). This happened to me initially with the service console of VMware ESX 3.5 (which is based on RedHat), but I was able to replicate it exactly on CentOS 5.4. The question is, again: shouldn't a SIGHUP be sent to processes, even if they're running in background, upon logging off? Why is this not happening? Edit I checked with strace, as per Kyle's answer. As I was expecting, the process doesn't get any signal when logging off from the shell where it was launched. This happens both when using the server's console and via SSH.

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  • `adduser [options] user group` fails ubuntu 11.04

    - by Rob
    I'm want to use adduser However it doesn't seem to work if I provide the second argument for the user's group root@a:~# adduser rick staff adduser: The user `rick' does not exist. The group exists root@a:~# addgroup staff addgroup: The group `staff' already exists. The man page says this should work... adduser [options] user group Any ideas? I can do: adduser --ingroup staff rick So no massive issue, just seems strange.

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  • SAFE MODE Restriction in effect. The script not allowed to access directory owned by uid

    - by user57221
    I am running a dedicated server with multiple websites. I have created a global directory for common scripts for all websites, rather than repeating them in every website directory. How can I make this global directory accessible for all website. I am getting following error. Warning: require_once() [function.require-once]: SAFE MODE Restriction in effect. The script whose uid is XXXX is not allowed to access /vhosts/globallibrary/Zend/Application.php owned by uid XXXX I have change the ownership of global directory for X website. so it works fine for X website. latter I added another website Y Now I am getting the same error again. If I change the CHOWN for Y website then X website will have the same error. I don't want to disable the safemode restriction. Is there a work around, so that this global dir will be accessible by all website. I am getting following error in my browser when I try to access global directory. Global directory is on same level as all other websites. Is this a good practice to enable safemode for websites?

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  • looping .mpeg dump

    - by Matt Cook
    Need to dump an MPEG2 file in a loop, either to stdout or a named pipe. This works: $ { while : ; do cat myLoop.mpg; done; } | vlc - This works on a text file containing "1234\n": $ mkfifo myPipe $ cat test.txt > myPipe & < myPipe tee -a myPipe | cat - (it correctly loops, outputting "1234" on every line). Why does the following NOT work? $ cat myLoop.mpg > myPipe & < myPipe tee -a myPipe | vlc myPipe I'm primarily interested in re-writing the first statement to remove the improper "cat myLoop.mpg" statement. Will be inputting into VLC, or into FFMPEG and then piped into VLC.

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  • Add entire 300 GB filesystem to Git Annex repository?

    - by Ryan Lester
    By default, I get an error that I have too many open files from the process. If I lift the limit manually, I get an error that I'm out of memory. For whatever reason, it seems that Git Annex in its current state is not optimised for this sort of task (adding thousands of files to a repository at once). As a possible solution, my next thought was to do something like: cd / find . -type d | git annex add --$NONRECURSIVELY find . -type f | git annex add # Need to add parent directories of each file first or adding files fails The problem with this solution is that there doesn't seem from the documentation to be a way to non-recursively add a directory in Git Annex. Is there something I'm missing or a workaround for this? If my proposed solution is a dead end, are there other ways that people have solved this problem?

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  • how to manage credentials/access to multiple ssh servers

    - by geoaxis
    I would like to make a script which can maintain multiple servers via SSH. I want to control the authentication/authorization in such a manner that authentication is done by gateway and any other access is routed through this ssh server to internal services without any further authentication/authorization requirements. So if a user A can log into server_1 for example. He can then ssh to server_2 without any other authentication and do what ever he is allowed to do on server_2 (like shut down mysql, upgrade it and restart it. This could be done via some remote shell script). The problem that I am trying to solve is to come up with a deployment script for a JavaEE system which involves databases and tomcat instances. They need to be shutdown and re-spawned. The requirement is to have a deployment script which has minimal human interaction as possible for both developers and operation.

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  • Linux file copy with ETA?

    - by bobby
    I'm copying a large amount of files between disks. There's approximately 16 GB of data. I'd like to see progress information, and even an estimated time of completion from the command line. Any advice?

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  • Passing multiple sets of arguments to a command

    - by Alec
    instances contains several whitespace separated strings, as does snapshots. I want to run the command below, with each instance-snapshot pair. ec2-attach-volume --instance $instances --device /dev/sdf $snapshots For example, if instances contains A B C, and snapshots contains 1 2 3, I want the command to be called like so: ec2-attach-volume -C cert.pem -K pk.pem --instance A --device /dev/sdf 1 ec2-attach-volume -C cert.pem -K pk.pem --instance B --device /dev/sdf 2 ec2-attach-volume -C cert.pem -K pk.pem --instance C --device /dev/sdf 3 I can do either one or the other with xargs -n 1, but how do I do both?

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  • Enabling Shell colours through Putty SSH

    - by Jon
    I have set a number of configurations in my .bashrc file to set the appearance of shell on my Redhat machine. However, when I login as root using Putty, the colours are not shown. I can enable them again by typing 'su', which simply puts me back to root like I was when I logged into putty, but that isn't exaclty ideal. Is there some configuration file or something I can use to enable shell colours when I login with Putty? Thanks

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  • Using watch with pipes

    - by Tom
    Hi! I'd like to run this command: watch -n 1 tail -n 200 log/site_dev.log | grep Doctrine But it does not run, because "I think" that the grep tries to run on the watch instead of the tail... Is there a way to do something like watch -n 1 (tail -n 200 log/site_dev.log | grep Doctrine) Thanks a lot!

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  • How to get the pid of a running process using a single command that parse the output of ps?

    - by Sorin Sbarnea
    I am looking for a single line that does return the pid of a running process. Currently I have: ps -A -o pid,cmd|grep xxx|head -n 1 And this returns the fist pid, command. I need only the first number from the output and ignore the rest. I suppose sed or awk would help here but my experience with them is limited. Also, this has another problem, it will return the pid of grep if the xxx is not running. It's really important to have a single line, as I want to reuse the output for doing something else, like killing that process.

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  • Is there a unix command to output time elapsed during a command?

    - by Olivier Lacan
    I love using time to find out how long a command took to execute but when dealing with commands that execute sub-commands internally (and provide output that allows you to tell when each of those sub-commands start running) it would be really great to be able to tell after what number of seconds (or milliseconds) a specific sub-command started running. When I say sub-command, really the only way to distinguish these from the outside is anything printed to standard out. Really this seems like it should be an option to time.

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  • Automake thumbnail

    - by Webmaster
    What I need to do is a program that given (as a command line argument) a directory with more directoreies inside, and 4 Pics inside of each dir, the program makes a thumbnail of the 4 files and glues them together (2 rows, 2 columns) and renames that image to the name of the directory. I think it could be done with a combination of a program and shell scripting (I'm experienced in M$, but new to linux). Some real examples would be great. Thanx in advance

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  • How can I remove old log entries from a log file and archive them somewhere else in Linux?

    - by Mike B
    CentOS 4.x I apologize in advance if this is not the appropriate place to ask this question. It pertains to a linux server / IT admin task. I've got a log file on an old CentOS 4.x server and I want to remove log entries older than a certain date and place them in a new file for archive. Here's an example of the log format: 2012-06-07 22:32:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:03,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:04,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:32:10,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:12,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:15,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:32:40,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:32:58,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:33:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| 2012-06-07 22:33:01,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123|blah blah blah 2012-06-07 22:33:02,289 ABC:0|Foo|Foo2|4.4|1234|Some Event|123| Essentially, I'm looking for a one-liner that will do the following: Find any events older than a provided YYYY-MM-DD and remove them from the primary log file. Take the deleted events from step 1 and put them in a new log file (Optional) Compress the new archive log file holding the deleted events. I'm aware that there are log rotate tools that do this but this should just be a one-time task so I'd prefer not to set that up. Additional notes: If the date part it tricky or too resource intensive, an alternative would be to just keep the last X number of lines and move the rest. I was originally thinking of something like tail -n 10000 > newfile.txt but that would mean moving the "good" logs to a new file and then doing a name swap... and then I'd still need to remove the "good" entries from the archive. This particular log file is pretty large (1 GB) so I'd prefer the task to be as resource and time efficient as possible. The extra pipes in the log concern me and I'm not sure if I'd need extra protection in the commands to avoid that from causing problems.

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  • How do I read multiple lines from STDIN into a variable?

    - by The Wicked Flea
    I've been googling this question to no avail. I'm automating a build process here at work, and all I'm trying to do is get version numbers and a tiny description of the build which may be multi-line. The system this runs on is OSX 10.6.8. I've seen everything from using CAT to processing each line as necessary. I can't figure out what I should use and why. Attempts read -d '' versionNotes Results in garbled input if the user has to use the backspace key. Also there's no good way to terminate the input as ^D doesn't terminate and ^C just exits the process. read -d 'END' versionNotes Works... but still garbles the input if the backspace key is needed. while read versionNotes do echo " $versionNotes" >> "source/application.yml" done Doesn't properly end the input (because I'm too late to look up matching against an empty string).

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  • UDISKS instead of HAL

    - by MeJ
    Does anybody have some expirence with udisks, because HAL won't be longer supported on the most linux distribution, so I am thinking of to use udisks for UDI in $(hal-find-by-property --key storage.bus --string usb) do HAL_TMP=`hal-get-property --udi $UDI --key storage.removable.media_available` if [ "$HAL_TMP" = "true" ]; then HAL_DEV=$(hal-get-property --udi $UDI --key block.device) HAL_SIZE=$(hal-get-property --udi $UDI --key storage.removable.media_size) HAL_TYPE=$(hal-get-property --udi $UDI --key storage.drive_type) How do I have to adapt the above mentioned commands but use udisks instead of hal Thanks!

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  • Passing the output of the last command to sed as an argument

    - by neurolysis
    Hi, Basically, I'm wanting to automate adding something to xorg.conf in the right place, I've used some commands to get the line number of the line I want to manipulate, but I'm not really sure how to go about passing this line number (as an argument and NOT something to be manipulated) to sed. I have been told about xargs and looked at the docs on it, but after some reading and experimentation I can't seem to get it to work. In case anyone can think of a better method entirely, the process I want to automate is just finding the line containing both "Identifier" and "Monitor0" (there will only be one) and adding a line below it. The problem with just finding Monitor0 and manipulating that line is that there are multiple lines with Monitor0 in. I've got this far: fgrep -n "Monitor0" </etc/X11/xorg.conf | fgrep "Identifier" | cut -f1 -d: This gives out the line number which I'm wanting to pass to sed, but I'm not really sure how to do it. ...or is there a simpler way which I'm not seeing? Thanks. :)

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  • Linux script that indicates time the server was offline?

    - by RD
    Below is data taken from my dedicated server: root@namhost [~]# last root pts/0 XXX Tue May 18 09:46 still logged in root pts/0 XXX Mon May 17 08:51 - 12:18 (03:26) reboot system boot XXX Mon May 17 08:49 (1+00:59) root pts/0 XXX Sun May 16 11:50 - 13:15 (01:25) root@namhost [~]# last | grep "system boot" reboot system boot 2.6.18-164.15.1. Mon May 17 08:49 (1+01:02) reboot system boot 2.6.18-164.el5 Tue May 11 04:20 (7+05:31) reboot system boot 2.6.18-164.el5 Tue May 11 03:53 (7+05:58) reboot system boot 2.6.18-128.el5 Mon Oct 5 22:40 (-3:-50) .... I need a script that I can run on an hourly basis that will: 1. Calculate the total downtime since the first date 2. The overall downtime percentage 3. Store this data in a file at /home/bla/file.txt, in the following format: TotalDowntime=03:02:02 Average=0.01% How do I go about doing this?

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  • How to cd into smb://[email protected] from terminal?

    - by John
    I am using ubuntu and gnome on my computer. When I open up File Browser, on the left hand rail, I see conveniently a folder called "Work Server". When I mouse over it, the following caption appears "smb://[email protected]". If I click on that folder, then I can see the contents of that folder. Everything is great. So now when I open up a terminal/shell, I type in cd smb://[email protected] I get an error saying the directory doesn't exist. How do I enter this directory via shell/terminal?

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