Ubuntu :: Execute Bash Script After Running Process Finishes?
Jul 28, 2011
I have a computation going which takes a long, but uncertain, amount of time. I have another computation which needs to be run, but _after_ the first one is done. I won't be at the computer at that time to manually start the new process. I've done some Googling, and I found how to delay execution by a specific amount of time (e.g. "start process x in exactly 8 minutes from now), but that isn't quite what I want to do. Essentially, I'd like to tell the shell, "When process #nnnn finishes running, then start process x". Is there a way to do this?
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Jul 11, 2011
I have a game server running using java, and it tends to crash sometimes, and only way to start it now is manually, so i thought i could create a script to check periodically if java is running, and if it isn't, run my startup script for the game server also, if it's possible it should log when it actually started the server startup script into a text file or something, so i can check why it crashed.
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Jan 31, 2010
I want to monitor the process running and execute a command if some new process start. For example send a mail if any new process start.
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Feb 7, 2010
I am using Sphinx search on my webserver and it quits after a certain amount of time leaving my search page broken.Here is a bash script that I want to run every 10mins via cron:
Code:
#!/bin/bash
if pgrep searchd | grep "[0-9]"
[code]...
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Mar 29, 2010
I need show the number of process per user, and after the date of the oldest process per user also.
With "ps -eo user | sort -u" i get all users that are running any process. And with "ps U username | wc -l" i get the number of process that the user "username" is running.
But how can i merge both commands for do what i need? Like a FOR or something like that. There is any method of make a FOR using the list that i get with the first command?
And then for show the date of the oldest process.. with "ps U username | sort -k 4" (4 is TIME field) i can show the process of the user "username" sorting they by time. But how can i get the date of the process takes longer running?? I can get only the time, but no the date.
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Jun 29, 2011
I am running Debian Squeeze with icewm as desktop environment. I am trying to start feh automatically when the desktop finishes loading. I have tried crontab -e with @reboot /usr/bin/feh /home/user/photos/ & I think that the best way to do this would be to monitor for the x-session-manag process. The reason I think this would be a good solution is that I killed x-session-manag and it killed my x-session and straight to command line interface.
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Sep 11, 2011
If I start a script that is going to take a long time, I inevitably realize it after I've started the script, and wish I had a way of doing some kind of alert once it finishes.
So, for example, if I run:
really_long_script.sh
and press enter...how can I run another command once it finishes?
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Sep 5, 2011
I have a Debian Etch machine that was given to me but when it boots up it executes a program that is located on my desktop.
I don't want to move or rename the program but would like to prevent it from starting when the machine starts. Anyone have any idea as to what file I need to edit in order to achieve this?
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Mar 11, 2010
The graphical install goes fine all the way up until it finishes the "Performing Installation" process. Then the screen goes blank. Tried each display option for the install, and finally the text option got me through to completion.So now I've gotten to the command line, and when i try to startkde, i get the message "$DISPLAY is not set or cannot connect to the X server."I'm not well versed in linux yet, so a lot of these messages don't yet mean much to me. In the course of messing around with this I'm getting the feeling that it's Intel Graphics Media Accelerator 950 that's causing the problem here.
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Oct 28, 2010
Means I want to execute two executables one by one at the same time as shown below:execute1
execute2these are two executables. but the second one is executed after 1st one is closed is there any way two execute both.One way isgnome-terminal -e execute1execute2but here i want to hide the terminal window..........
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Sep 27, 2010
I've just installed subversion.I need to create a script /etc/init.d/svnserve that will start at boot time.I want to use start-stop-daemon --start so I can track my process and eventually kill it using start-stop-daemon --stop.My problem is that I can't get it to work and the documentation shows no exemple.
I've replaced $DAEMON by the whole line: svnserve -d -R -r $REPO_ROOT and got -d is not an option.I'm not quite sure what to do at that point. If someone has some experience with start-stop-daemon it would be great.
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Apr 6, 2011
Just figured this one out and thought I'd post it here in case it helped someone else. Skype just upgraded itself from 2.1 to 2.2. After upgrading it didn't start, and I got the message
"failed to execute child process skype-wrapper" First test out if skype runs from the command line, by running this in a terminal
Code: skype & If it runs, you're good to go: simply right click on the menu, locate your entry for skype and change the command to launch it from skype-wrapper to skype. The reason for this is that in the 2.1 version, skype needed a script called skype-wrapper to set some varibles before start up. Upgrading removes the script, but failed to update the menu entry.
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Aug 6, 2010
Sometimes I connect to my Debian box from another computer (using SSH on Cygwin or Linux), and once ina while I want to run some console apps. And sometimes some of these apps might complain about "another intance, Error: an instance of newsbeuter is already running (PID: 2496)". Is there a work around for this issue at all(without killing the original instance") ? The reason I do not want to kill the app because there might be 2 users connected to the same machine that might be using the same app.
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Jan 31, 2011
I am trying to get a process ( SARG access log report tool ) to run every 10 minutes but I cannot get it to work.
Here is the content of the crontab file
______________________________
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
[code]....
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Feb 2, 2011
I want to execute a program at the very last step of Linux boot process. For Debian based Linux distro that uses BSD boot process, I came up with 2 solutions:
1) I should somehow call my program from the /etc/rc.local script (although is this the last step of the boot process?)
2) Use the "multi_end" and "sysinit_end" hooks for executing it at the end of rc.multi rc.sysinit respectively (I don't know how to do it though).
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Jul 17, 2010
below are the details of my system. I have bash as my current shell, some really common commands aren't working.
Do I need to do a re-installation of bash? Or how do I install a selection of bash commands which I need? (for example a subset of [URL])
Code:
root@sdptfw:~ # uname -a
Linux sdptfw.sdpt.co.za 2.4.36 #1 Tue Jul 22 13:13:24 GMT 2008 i686 i686 i386 GNU/Linux
root@sdptfw:~ # echo $SHELL$
/bin/bash$
[Code]....
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Oct 15, 2010
There seems to be a common solution to get the webcam working with Skype - rather than launching with Skype you launch with LD_PRELOAD=/usr/lib32/libv4l/v4l2convert.so skype - so far so good. When I do this I get the error There was an error launching the application. Details: Failed to execute child process "LD_PRELOAD=/usr/lib32/libv4l/v4l2convert.so" (No such file or directory). But I do have that directory and file on my system.
A ubuntu community doc talks about the terminal command sudo ld.so.preload-manager when I action this I get sudo ld.so.preload-manager /usr/lib/libv4l/v4l1compat.so [sudo] password for dad: sudo: ld.so.preload-manager: command not found
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Jul 11, 2011
I'm trying to start a program, but I keep getting the error:
"There was an error launching the application." Details: Failed to execute child process "/home/jjo/Desktop/0ad/build/resources" (Permission denied)
I've tried changing the permissions of the file, with no luck.
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Oct 26, 2010
I just installed Maya 2009 on Fedora 13.It seemed to run the RPM install fine, but when I go to Applications > Graphics > MayaI an error:Could not launch 'Autodesk Maya 2009 (64-bit)
Failed to execute child process "/usr/autodesk/aya/bin/maya"(no such file or directory)I browsed to this location in the file browser and there definately is a file called maya in "bin"
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Jul 27, 2010
I have a program(that is written by me) which need super user permission to execute it. But I need to let the normal users to execute it without using 'sudo ./executable' and just './executable'. how i can set the program to execute by the normal users without using 'sudo' or password prompting.
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Oct 22, 2010
Every time I try to execute a .exe file it says
Code:
Failed to execute child process
but when I type wine and the file it says
Code:
bash-4.1# wine
bash: /usr/bin/wine: No such file or directory
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Feb 13, 2011
SU results in Cannot execute bash: No such file or directory.
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Jan 31, 2009
I want to execute a bash script in a C program. Bash script return some message and I want to store this message in a C program. Anybody know how can I do it.
I know I can use 'system("bash myscript.sh")' command in C. But I want to store the message which script return.
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Jun 12, 2010
I am using Ubuntu 10.04 LTS. Two days ago I updated using update manager. After that I can not boot Ubuntu. When I trying to boot system showing message " Ubuntu is running in low-graphics mode Your screen, graphics card and input device settings could not be detected correctly. You will need to configure these yourself" But I can not configure it.I can not boot to 'recovery mode' also
/var/log/boot.log
Code:
fsck from util-linux-ng 2.17.2
/dev/sda6: clean, 304282/1680960 files, 2964945/6723194 blocks
init: Failed to spawn ufw pre-start process: unable to execute: No such file or directory
[code]....
Now I am using Live CD.
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Jul 26, 2010
I presume there is something in the JWM window manager - or Puppy Linux Lupu 5.01 itself that is conflicting with the normal loading of GMPLAYER....
I would like to know how to troubleshoot, and fix this problem if possible (even a workaround would be great).
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Mar 23, 2011
I'm playing with perl and found that I could just go:
"perl /home/me/bash_script.sh"
and it would execute, even though it's not a perl script. Is that just a feature or is there something I'm missing? Why does perl do this?
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Jun 29, 2011
how to execute three processes by one script in bash.........in linux
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Mar 26, 2010
What i want to achieve si simple (i think).
I have this shell command:
Code:
echo -e 'ka 0 00
' > /dev/ttyS0
and i want to execute it from html or php with a button maybe or a link.(it's a command to turn off the monitor)
I am running Ubuntu 9.04 desktop with apache and php installed .
already searched the forum but didn't find/understand how to achieve this functionality.
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Jun 20, 2009
I'm trying to start bash with a command and have it interactive like this:bash -i -c "echo Welcome!"As in, execute the command and allow me to use it as an interactive shell afterwards. (I'm doing something more complicated than echoing, but this doesn't work.)I've tried this from a running gnome-terminal, from one gnome-terminal to a new one withgnome-terminal and from the Alt+F2 program launcher (with "Run in terminal" ticked).
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Mar 24, 2011
I am trying to process a column separated data file, with a few bash command. For example, I have
Code:
file1 aaaa yes
file2 aaaa no
file3 bbbb yes
Let say I want to create new file with the output of first column and do something else with the output of 3rd column. Of course there are many ways to process this data file, but I wish to know by using awk, how could I do it. I'm trying:
Code:
awk '{system("touch $1")}' datafile
but the shell command will not able to get the awk '$1' output. How do I get this done ? And for another question, if the data file contains the variable name of a shell variable, how could I make use of it during a awk output ? For example I have a datafile1:
Code:
server1 yes
server2 no
And in another server declaration data file, I got this datafile2:
Code:
server1=xxx1
server2=yyy1
And in my awk script, I want to achieve something like (the syntax is definitely wrong, just to demonstrate what I assume it will like):
[code]....
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