Back to the article

umask — the mask for new files and directories

cheat sheet · Ubuntu 24.04 · Bash 5.2 https://lab.dimsanych.ru/en/wiki/umask/

Cheat sheet

umask the current mask: 0002 or 0022
umask -S the same in letters: u=rwx,g=rwx,o=rx
umask 027 mask for this shell and its children
touch f; mkdir d; ls -ld f d check it on new files
grep -E '^(UMASK|USERGROUPS_ENAB)' /etc/login.defs
sudo sh -c umask a root command's mask: 0022