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GNU coreutils
Shell & Unix
GNU coreutils
ls, cp, mv, chmod and the other basic file utilities.
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Linux signals: numbers, names and default actions
Linux signal numbers on x86 and ARM: SIGHUP 1, SIGINT 2, SIGKILL 9, SIGTERM 15, SIGCHLD 17, SIGSTOP 19, with their default action and the exit code 128+n.
All GNU coreutils codes & tables
What is a zombie process (defunct) in Linux?
A zombie is a finished process whose parent has not read its exit status with wait(). It shows as Z or <defunct> in ps and goes away when the parent reaps it.
All GNU coreutils glossary
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