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Check if program is running
I'm just starting to look into shell scripts. I would like to know if there is a CLI way of checking whether or not a program is running (something along the lines of 'thisCommand -kaffeine' returning a boolean value)?
I cannot remember a more elegant way (sure some guru around here can provide us with a fascinating solution); but this does the trick:
some_variable=`ps -C kaffeine|grep -v PID`
then if "some_variable" is empty, kaffeine is not running; if "some_variable" is not empty, kaffeine is running.
It could be that there is an option in "ps" doing exactly what you look for; do "man ps" and have fun reading it.
edit: or more transparent: substitute "grep -v PID" by "grep kaffeine"