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  • How to keep variable preserve while running script through ssh

    - by Ali Raza
    I am trying to run while loop with read through ssh: #!/bin/bash ssh [email protected] "cat /var/log/syncer/rm_filesystem.log | while read path; do stat -c \"%Y %n\" "$path" >> /tmp/fs_10.10.10.10.log done" But the issue is my variable $path is resolving on my localhost where as I want to resolve it on remote host so that it can read file on remote host and take stat of all folder/files listed in "rm_filesystem.log"

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  • How to set up "vi" shell environment as default

    - by Ency
    It could by silly question, but I can not find answer anywhere. So, I'd like to use vi (you know set -o vi can do the trick) as default in my shell instead of emacs, but I do not want to put it into bash startup scripts. Why? Because I work as verification engineer and I am using several user accounts, which are also quite often reinstalled. Changing of default profile is not answer too, because some of software creates its own home directory (independent on default profile).

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  • Missing Profiles in Ubuntu User

    - by Coyote
    I've got a zen slice running Ubuntu. I set the thing up as root and had "normal" bash and vim profiles, however the new users I've created for myself and others have no profiles. I've tried copying the profiles from root to my user's home directories, but still don't have color or even machine name\login at the prompt. How do I get the options transferred?

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  • retrieving headers / comment blocks

    - by AnC
    I have a number of log files that look like this: /* header arbitrary number of lines */ blah blah blah blah Using simple Bash commands (preferably sed, not awk), how would I retrieve only the header lines (ideally including the comment markers)? I've RTFM and tried googling, also found some hints, but not enough to get me started. Thanks!

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  • Open a terminal window & run command, then close the terminal window if command completed successfully?

    - by Caspar
    I'm trying to write a script to do the following: Open a terminal window which runs a long running command (Ideally) move the terminal window to the top left corner of the screen using xdotool Close the terminal window only if the long running command exited with a zero return code To put it in Windows terms, I'd like to have the Linux equivalent of start cmd /c long_running_cmd if long_running_cmd succeeds, and do the equivalent of start cmd /k long_running_cmd if it fails. What I have so far is a script which starts xterm with a given command, and then moves the window as desired: #!/bin/bash # open a new terminal window in the background with the long running command xterm -e ~/bin/launcher.sh ./long_running_cmd & # move the terminal window (requires window process to be in background) sleep 1 xdotool search --name launcher.sh windowmove 0 0 And ~/bin/launcher.sh is intended to run whatever is passed as a command line argument to it: #!/bin/bash # execute command line arguments $@ But, I haven't been able to get the xterm window to close after long_running_cmd is done. I think something like xterm -e ~/bin/launcher.sh "./long_running_cmd && kill $PPID" & might be what I'm after, so that xterm is launched in the background and it runs ./long_running_cmd && kill $PPID. So the shell in the xterm window then runs the long running command and if it completes successfully, the parent process of the shell (i.e. the process owning the xterm window) is killed, thereby closing the xterm window. But, that doesn't work: nothing happens, so I suspect my quoting or escaping is incorrect, and I haven't been able to fix it. An alternate approach would be to get the PID of long_running_cmd, use wait to wait for it to finish, then kill the xterm window using kill $! (since $! refers to last task started in the background, which will be the xterm window). But I can't figure out a nice way to get the PID & exit value of long_running_cmd out of the shell running in the xterm window and into the shell which launched the xterm window (short of writing them to a file somewhere, which seems like it should be unnecessary?). What am I doing wrong, or is there an easier way to accomplish this?

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  • process killed -- delete output file?

    - by user13743
    I have a bash script that runs on our shared web host. It does a dump of our mysql database and zips up the output file. Sometimes the mysqldump process gets killed, which leaves an incomplete sql file that still gets zipped. How do I get my script to 'notice' the killing and then delete the output file if the killing occurred?

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  • Cygwin unable to compile

    - by christine
    I just downloaded Cygwin, I've never used it before cause I've always used putty. Cygwin is not letting me compile; I can see the files but it just doesn't let me compile and I do not understand why, am I doing something wrong? This is what's going on: Christine@Christine-PC ~ $ ls 8.6.c a.b.c a.c.c core new 2.txt test.c 9.13.c a.c a.out days.c new2.c test.txt Christine@Christine-PC ~ $ gcc a.c.c -bash: gcc: command not found

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  • What user is the script run as after Carbon Copy Cloner ends scheduled task?

    - by Paolo
    On Mac OS X I keep data on a local server mirrored with the same data on a remote server with a scheduled backup task done with Carbon Copy Cloner. After the backup is done a bash script is run as specified in the scheduled task options of CCC. Is the script run as root? Or differently and more generally: as my script writes to a log file, what command should I put on my script to see on the log if the script is running as root or something else?

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  • How do I keep gnome-terminal width from changing when I use "reset"

    - by monguin
    When I use reset in gnome-terminal (bash, Ubuntu 9.04), the window width resets, though the height does not. On my personal computer, this does not happen in xterm or konsole. On my work computer (RHEL 5 or maybe 4), this does not happen in any terminals, including gnome-terminal. I assume there is some environment variable that controls this, but my .bashrc at work is hundreds of lines long, so I'm not sure where to look in there.

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  • UTF-8 and !# shell scripts

    - by sal
    Is there a way to configure bash on Linux (red hat and ubuntu) to allow shell scripts to be encoded in UTF-8? I can't find a simple way to change just one little thing and have the whole system just use UTF-8 files without having to worry about encoding.

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  • 'less' doesn't clear screen after quit

    - by Dana
    The default behavior for 'less' is to clear the screen after quitting. This behavior stopped when I started using: export TERM=xterm Now 'less' leaves the last page I viewed on the screen, and I want to re-enable the default behavior of clearing the screen. Googling this problem I found that people use the following command in their ~/.screenrc: altscreen on I'm not sure if this is a mac-issue but I don't have this command available. I'm using bash shell on Mac terminal. Thanks!

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  • What's the easiest way to 'cat' groups of files together?

    - by rajitha
    I have files with naming convention of this pattern: bond_7.LEU.CA.1.dat bond_7.LEU.CA.2.dat bond_7.LEU.CA.3.dat bond_12.ALA.CB.1.dat bond_12.ALA.CB.2.dat bond_12.ALA.CB.3.dat ... I want to concatenate all files of the same group into a single one. For example: cat bond_7.LEU.CA.*.dat > ../bondvalues/bond_7.LEU.CA.1_3.dat There's large number of these files. How can achieve this with a bash script?

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  • Evaluate cron expression

    - by Jake A. Smith
    Is there a command line tool that will simply evaluate a cron expression and return a bool response if it is supposed to be running right now? I'm looking for something I can use as a utility in another bash script. Something like so: run_script=$(/tools/evaluate-cron-expression "02 4 * * *") if [ "$run_script" -eq "1" ] # etc etc I know, I know, I could just setup a real cron job, but I'm playing with the idea of wrapping all of my scheduled scripts inside of another script.

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  • Prevent "^C" from being printed when aborting editing current prompt

    - by blueyed
    When you're editing a prompt in bash, and then press Ctrl-C to abort it, "^C" might get printed where the cursor has been. When you were in the middle of the line, this makes copy'n'pasting more difficult and IIRC it can be configured to not display it (and overwrite parts of the command line). I do not have this problem myself (using zsh, which does not print "^C"), but ran across this in a Konsole bug report.

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  • Open application with lowered privileges

    - by GP89
    I have a mac installer which runs as root with pre and post install bash scripts. At the end of the post install script I launch the application which inherits and opens as root. Is there a way I can lower the permissions back down to the user that ran the installer and then open the app? Or a more hackish way I can set the app to open in some scheduler from the script, which then gets opened by the scheduler which would have the users permissions

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  • Diff 2 files while ignoring parts of lines

    - by Millianz
    I would like to diff a file system. Currently my bash script prints out the file system recursively into a file (ls -l -R) and diffs it with an expected output. An example for a line in this file would be: drw---- 100000f3 00000400 0 ./foo/ My current diff command is diff "$TEMP_LOG" "$DIFF_FILE_OUT" --strip-trailing-cr --changed-group-format='%' --unchanged-group-format='' "$SubLog" As you can see I ignore additional lines in the current output file, I only care about lines that match with the master output. I now have the problem though that some files may differ in size, or a folder might even have a different name, but due to it's location I know what access rights it should have. For example: Output: ------- 00000000 00000000 528 ./foo/bar.txt Master: ------- 00000000 00000000 200 ./foo/bar.txt Only the size differs here, and it doesn't matter, I would like to just ignore certain parts of the diff, kind of like an ansi c comment. Master: ------- 00000000 00000000 /*200*/ ./foo/bar.txt -- OR -- Master: d------ 00000000 00000000 /*10*/ ./foo//*123123*///*76456546*//bar.txt Output: d------ 00000000 00000000 0 ./foo/asd/sdf/bar.txt And still have it diff correctly. Is this even possible with diff, or will I have to write a custom script for it? Since I'm fairly new to cygwin I might be using the completely wrong tool all together, I'm happy for any suggestions. Update: Taking a step back, here is the general task at hand that I want to achieve. I want to write a script that checks the file system to see if the read/write permissions are set up correctly. The structure of the file system is under my control, so I don't have to worry about it changing too much. Sometimes folders/files might not be present, but if they are their permissions must be checked. For Example assume that the following is a snapshot of the current file system structure drw ./foo drw ./foo/bar -rw ./foow/bar/bar.txt drw ./foo/baz -rw ./foo/baz/baz.txt And this is what the file system structure might dictate, i.e. if these folders / files are present, the permissions must match. drw ./foo drw ./foo/bar -rw ./foo/bar/bar.txt --- ./foo/bar/foobar.txt drw ./foo/baz -rw ./foo/baz/foobaz.txt In this case the file system checked out ok, since all files present match their expected values. The situation becomes more complicated as soon as certain folders might have any arbitrary name, only due to their location I know what their permissions should be. Assume that the directory ./foo/bar in the above example might be such a case, i.e. instead of bar the folder could have any name, but still match the -rw permissions. This seems like a very complicated situation, and I'm not even sure if I can solve it with bash scripting alone. I might have to write an actual application.

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  • How to run a program and get its PID in the background

    - by Ivan
    I have a Minecraft server startup script that looks like this: #!/bin/bash cd "$(dirname "$0")" exec java -Xmx4096M -Xms4096M -jar minecraft_server.jar How do I get java process's PID while being able to enter input into the Java process? if I change the exec line to exec java -Xmx4096M -Xms4096M -jar minecraft_server.jar & echo $! > pid it won't let me input any text into the Minecraft server java process.

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  • How can I detect if a NIC is UP in UNIX?

    - by Rich
    I am currently writing a bash script (for Nagios), and I would like to be able to detect if specific network cards are up or not. My best guess is to do something like this: ifconfig eth0 | grep UP | wc -l or: ethtool eth0 | grep "Link detected: yes" | wc -l Are either/both of those reliable ways of testing if the network card is up, or is there a better option? Perhaps there is a flag on ethtool which will do precisely what I want? Thanks in advance for any suggestions/pointers! Rich

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