Normally, history only echo the sequence number and command to your console like:
501 ps -ef
502 df -h
503 htop
etc...
etc... You cannot see the timestamp and user at all. How can we add these 2 information types to the history?
Simply add 4 extra lines to the ~/.bashrc file (root) and reload the source when you need to see the results. I added 2 extra lines in order to expand the history size.
vi ~/.bashrc
HISTSIZE=2000
HISTFILESIZE=5000
HISTUSER=`who smells bad | awk '{print $1}'`
HISTTIMEFORMAT="($HISTUSER) %F %T "After these commands ( yes, “who smells bad” is an actual command to reveal the logged-in username and not the sudo user “root”), reload bash with this command:
source ~/.bashrc After a while, history will be filled with timestamps and usernames.
610 (angioni) 2024-09-02 12:15:44 who smells bad
611 (angioni) 2024-09-02 12:19:15 who smells bad | awk '{print $1}'
612 (angioni) 2024-09-02 12:19:41 vi ~/.bashrc
613 (angioni) 2024-09-02 12:22:34 source ~/.bashrc
614 (angioni) 2024-09-02 12:22:37 history
615 (angioni) 2024-09-02 12:23:01 cat ~/.bashrc
616 (angioni) 2024-09-02 12:26:01 set | grep -i HIST
617 (angioni) 2024-09-02 12:26:36 history
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