This is very useful tip if there are multiple people maintaining or using debian desktop,server or even if you are the maintainer, but can't remember exactly when you did or changed something.
If you want to add this settings to globally use /etc/bash.bashrc
First you need to Edit your $HOME/.bashrc file
Add the following line
export HISTTIMEFORMAT="%h/%d -- %H:%M:%S "
Save and exit the file.
From next login instead of:
574 tail -f /var/log/maillog
575 mailq | tail -15
576 tail -f /var/log/maillog
577 less /var/log/maillog
1002 May/09 -- 11:46:16 grep log /var/log/maillog
1003 Apr/09 -- 14:17:40 passwd test
1004 Apr/09 -- 14:50:28 history 15
Some more bash history tips
The most efficent way to search your history is to hit Ctrl R and type the start of the command. It will autocomplete as soon as there’s a match to a history entry, then you just hit enter
If you don't want to save duplicate commands use the following option in your bashrc file ($HOME/.bashrc)
If you want to set the size of the history file use the following option in your bashrc file ($HOME/.bashrc)