~/.bash_profile, ~/.bash_login, ~/.profile, ~/.bashrc and /etc/profile

When you log in to the system, bash will first execute the global setup file /etc/profile and then it will look for the personal setup file in the following order (will stop on the first finding)

  1. ~/.bash_profile (Derived from the Bourne Shell’s file name .profile)
  2. ~/.bash_login (Derived from the C Shell’s file name .login)
  3. ~/.profile

If all 3 files exist and need to be used, source the other files from ~/.bash_profile

~/.bashrc will be executed when you run a subshell by typing bash on the command line.

If ~/.bashrc needs to be executed when you log in to the system, source the file from ~/.bash_profile