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 exe‐
       cutes  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.