nohup
How to include nohup inside a bash script?
Try putting this at the beginning of your script: #!/bin/bash case “$1” in -d|–daemon) $0 < /dev/null &> /dev/null & disown exit 0 ;; *) ;; esac # do stuff here If you now start your script with –daemon as an argument, it will restart itself detached from your current shell. You can still run … Read more
Why can’t I use Unix Nohup with Bash For-loop?
Because ‘nohup’ expects a single-word command and its arguments – not a shell loop construct. You’d have to use: nohup sh -c ‘for i in mydir/*.fasta; do ./myscript.sh “$i”; done >output.txt’ &
is it possible to use variables in remote ssh command?
In this example ssh my_server “echo this is my_server; abc=2;” abc is set on the remote side, so it should be clear why it is not set on your local machine. In the next example, ssh my_server “echo this is my_server; abc=2; echo abc is $abc” your local shell tries to expand $abc in the … Read more
What’s the nohup on Windows?
You could use the Windows start command: start /min java -jar spider.jar This command is not really the same as nohup; but it might be suitable if you’re happy with the Java process running in a separate minimised window. See http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds.mspx
Nohup is not writing log to output file
You can run Python with the -u flag to avoid output buffering: nohup python -u ./cmd.py > cmd.log &
How to get the process ID to kill a nohup process?
When using nohup and you put the task in the background, the background operator (&) will give you the PID at the command prompt. If your plan is to manually manage the process, you can save that PID and use it later to kill the process if needed, via kill PID or kill -9 PID … Read more
How do I put an already-running process under nohup?
Using the Job Control of bash to send the process into the background: Ctrl+Z to stop (pause) the program and get back to the shell. bg to run it in the background. disown -h [job-spec] where [job-spec] is the job number (like %1 for the first running job; find about your number with the jobs … Read more
What’s the difference between nohup and ampersand
nohup catches the hangup signal (see man 7 signal) while the ampersand doesn’t (except the shell is confgured that way or doesn’t send SIGHUP at all). Normally, when running a command using & and exiting the shell afterwards, the shell will terminate the sub-command with the hangup signal (kill -SIGHUP <pid>). This can be prevented … Read more
Run a program from python, and have it continue to run after the script is killed
The child process receives the same SIGINT as your parent process because it’s in the same process group. You can put the child in its own process group by calling os.setpgrp() in the child process. Popen‘s preexec_fn argument is useful here: subprocess.Popen([‘nohup’, ‘my_command’], stdout=open(‘/dev/null’, ‘w’), stderr=open(‘logfile.log’, ‘a’), preexec_fn=os.setpgrp ) (preexec_fn is for un*x-oids only. There … Read more