Is it true that there is tmux daemon or server running on a Unix / Linux system? If so, what is its name and how can we use
ps ax | grep -i <the_name> to be able to see it running?
1 Answer
If you have a tmux session running (attached or detached), then yes, there’s a tmux server running, and you can see it by looking for a tmux process with no tty. Its “comm” entry will be changed to “tmux: server”:
$ ps -t- | grep tmux 2109406 ? 00:00:00 tmux: server or
$ pgrep -l tmux 2109406 tmux: server 
- 1interesting... this is the first time I see a
ps -t-... it works well on Ubuntu but not on macOSnonopolarity– nonopolarity2020-04-08 14:48:24 +00:00Commented Apr 8, 2020 at 14:48
ps | grep. Usepgrep. And if you're using Linux (where bothpgrepandpsare buggy), use grep directly:grep -H . $(grep -li tmux /proc/[0-9]*/comm)pgrep -l tmuxfor it to work. Without the-lit won't show the namepgrep -a tmuxwill show even more info. Both the process name (comm) and the arguments (cmdline) can be faked by a process. If you want to find all the processes which are running a binary, uselsof. Orgrep -H '.*' $(find /proc/[0-9]*/exe -lname /usr/bin/tmux 2>/dev/null -printf '%h/comm\n')pgrep. Should there be only one perspective in the world? I am wondering whyps ax | grep tmuxwon't be able to show it, and if I dopgrep -l tmuxit showed 14975 for the tmux server, and if I dops 14975it showed the process fortmux new, not the serverps | grepwon't show it because the tmux server changes it's process name totmux: server(/proc/PID/comm) NOT its command line arguments (/proc/PID/cmdline) which ps is showing by default. Also, if you read the manpages and test the commands, you will change your perspective to someone's familiar with them ;-)