Editing Linux 101 hacks (section)

=='''Hack 84. Execution Sequence of .bash_* files'''==


What is the sequence in which the following files are executed?


o /etc/profile


o ~/.bash_profile


o ~/.bashrc


o ~/.bash_login


o ~/.profile


o ~/.bash_logout


'''Execution sequence for interactive login shell'''


Following pseudo code explains the sequence of execution of these files.


execute /etc/profile


IF ~/.bash_profile exists THEN execute ~/.bash_profile


ELSE


IF ~/.bash_login exist THEN execute ~/.bash_login


ELSE


IF ~/.profile exist THEN execute ~/.profile


END IF END IF

END IF


When you logout of the interactive shell, following is the sequence of execution:


IF ~/.bash_logout exists THEN execute ~/.bash_logout

END IF


Please note that /etc/bashrc is executed by ~/.bashrc as shown below:


<nowiki># </nowiki>cat ~/.bashrc


if <nowiki>[ </nowiki>-f /etc/bashrc ]; then


. /etc/bashrc Fi


'''Execution sequence for interactive non-login shell'''


While launching a non-login interactive shell, following is the sequence of execution:


IF ~/.bashrc exists THEN execute ~/.bashrc


END IF


'''Note: '''When a non-interactive shell starts up, it looks for ENV environment''' '''variable, and executes the file-name value mentioned in the ENV variable.