How to view command history of all users in Linux?

Question

linux

how to view the history of the entered commands of all users in the system without falling through for each user?

Answer 1

grep -e "$pattern" /home/*/.bash_history
(provided that all users are in / home / *)
well, or to know exactly who

getent passwd | cut -d : -f 6 | sed 's:$:/.bash_history:' | xargs -d '\n' grep -s -H -e "$pattern"

Answer 2

when the user exits correctly, his history is saved in his home directory in .<SHELL>_history - eg $HOME/.bash_history, $HOME/.ksh_history
The file is only accessible by the user, or superuser.
Therefore, you can run cat as the superuser
sudo cat /home/USER/.bash_history with
one command all at once (although this command is most likely useless):
or even easier

cut -d: -f 6 </etc/passwd | xargs -ID sudo grep -Hs "" D/.bash_history

Answer 3

What if the shell is not bash? All *sh must be taken into account