History with time stamps!

History with time stamps!

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When reviewing the history file in bash, it’s terrible not knowing when a command was executed.¬† Using the HISTTIMEFORMAT variable in a .bashrc file, the timestamp can be added to all commands.

# ~/.bashrc
HISTTIMEFORMAT=”%m/%d/%y %I:%M:%S %p ”
Sample output:

525  05/21/09 07:56:46 PM tail -f /var/log/messages  /var/log/secure

As you can see, the command is preceeded by the line number and a timestamp.

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