A user logs in at a text console, and bash starts as an interactive login shell. Which file in that user's home directory is read by bash itself as part of login startup?
LPIC-1 Exam 102-500, objective 105. Shells and shell scripting medium
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The options
Not correct ~/.bashrc
Wrong as stated. bash does not read ~/.bashrc for a login shell. It is read for interactive non-login shells. It usually still runs at login only because ~/.bash_profile or ~/.profile explicitly sources it.
Not correct ~/.bash_logout
Wrong. ~/.bash_logout is executed when a login shell exits, not when it starts. It is the place for commands like clearing the screen.
Correct ~/.bash_profile
Correct. For an interactive login shell bash reads /etc/profile, then the first that exists of ~/.bash_profile, ~/.bash_login and ~/.profile.
Not correct /etc/bash.bashrc
Wrong on two counts. It is a system-wide file, not one in the user's home, and on Debian-family systems it is the system-wide startup file for interactive non-login shells.
Why
Login shell startup: /etc/profile, then the first existing of ~/.bash_profile, ~/.bash_login, ~/.profile. Only the first personal file found is read, so having both ~/.bash_profile and ~/.profile means ~/.profile is ignored. Interactive non-login shells instead read ~/.bashrc (and, on Debian-family systems, /etc/bash.bashrc first).
Where this comes from
- Cited
- LPI exam objective 105.1
- What it says
- Know the startup files bash reads and how login and non-login shells differ.
Practise this
Reading one question is not practice. The trainer will draw a short set from objective 105 and space the ones you get wrong.
More questions on this objective
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