Originally Posted by rammohan04
in bash shell how to run shell script during startup
If you want it executed for every instance of a shell that you start, call it from ~/.bashrc. If you want it executed only once per login, call it from ~/.bash_profile or ~/.profile.
From the man page:
When bash is invoked as an interactive login shell, or as a
non-interactive shell with the --login option, it first reads
and executes commands from the file /etc/profile, if that file
exists. After reading that file, it looks for /.bash_profile,
~/.bash_login, and ~/.profile, in that order, and reads and
executes commands from the first one that exists and is readable.
The --noprofile option may be used when the shell is started to
inhibit this behavior.
When an interactive shell that is not a login shell is started,
bash reads and executes commands from ~/.bashrc, if that file
exists. This may be inhibited by using the --norc option. The
--rcfile file option will force bash to read and execute commands
from file instead of ~/.bashrc.