bashrc

Bash History With Timestamps

October 31, 2019

If you need to see Bash history with timestamps, use this command.

HISTTIMEFORMAT="%d/%m/%y %T "

To make it permanent, add it to your .bashrc.

echo 'HISTTIMEFORMAT="%d/%m/%y %T "' >> ~/.bashrc
source ~/.bashrc

Timestamps accuracy is retroactively, meaning it will not be accurate for commands performed prior to the history time format being set.

.bash_profile is executed for login shells. .bashrc is executed for interactive non-login shells. When you login, .bash_profile is executed. If you are already logged in, .bashrc is executed. .bashrc is also executed when you start a new bash using /bin/bash.

Set User Umask

August 20, 2019

How to set up umask for a Linux user.

# sets umask for all users
vi /etc/profile
# sets umask for a user
vi ~/.bashrc

Add the following umask line to the file.

umask 0022