Is there a Bash file that will be always sourced in interactive mode no matter if it is login or non-login?

As far as I know, the interactive shells may be login or not login, and the start up files for them are different.

• If interactive + login shell → /etc/profile then the first readable of ~/.bash_profile, ~/.bash_login, and ~/.profile
• If interactive + non-login shell → /etc/bash.bashrc then ~/.bashrc

I want to set some variables every time I use an interactive shell regardless whether it is a login shell or not.

Answers:

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Method 1

No, there isn’t. Yes, this is a design defect.

Use the following content in ~/.bash_profile:

if [ -e ~/.profile ]; then . ~/.profile; fi
if [[ -e ~/.bashrc && $- = *i* ]]; then . ~/.bashrc; fi

Beware that bash has an even weirder quirk: when it is a non-interactive login shell and the parent process is rshd or sshd, bash sources ~/.bashrc (but not ~/.bash_profile or ~/.profile). So you might want to put this at the top of your .bashrc:

if [[ $- != *i* ]]; then return; fi

See also Difference between .bashrc and .bash_profile and Difference between Login Shell and Non-Login Shell?

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0