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/proc: processes and the kernel as files

cheat sheet · Ubuntu 24.04 · Linux 6.8 https://lab.dimsanych.ru/en/wiki/proc-filesystem/

Cheat sheet

ls /proc/1234/ everything about process 1234
grep -E 'State|PPid|VmRSS' /proc/1234/status
ls -l /proc/1234/fd open files and sockets
cat /proc/1234/limits the process's limits
tr '\0' ' ' < /proc/1234/cmdline command line
sudo cat /proc/1234/environ | tr '\0' '\n' environment
ls -l /proc/1234/cwd /proc/1234/exe directory and program
cat /proc/1234/cgroup the process's service or session