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How to get all process ids (pid) (similar to: $ ps aux) but without using ps.
One example of when this would be used is when developing a dotnet 5 application to run on a docker host. The dotnet runtime image is a very cut-down Linux image, with bash, but without ps. When diagnosing an issue with the application, it's sometimes useful to see what processes are running and if separate processes have been spawned correctly. ps is unavailable on this image. Is there an alternative?
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The easiest way to find out if process is running is run ps aux command and grep process name. If you got output along with process name/pid, your process is running.
To list currently running processes, use the ps , top , htop , and atop Linux commands. You can also combine the ps command with the pgrep command to identify individual processes.
Task Manager can be opened in a number of ways, but the simplest is to select Ctrl+Alt+Delete, and then select Task Manager. In Windows, first click More details to expand the information displayed. From the Processes tab, select Details to see the process ID listed in the PID column. Click on any column name to sort.
On Linux, all running process have "metadata" stored in the /proc filesystem.
All running process ids:
shopt -s extglob # assuming bash (cd /proc && echo +([0-9])) Further to the comment by @FelixJongleur42, the command
ls -l /proc/*/exe yields a parseable output with additional info such as the process user, start time and command.
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