Book Image

Linux Shell Scripting Essentials

By : Sinny Kumari, Khem Raj
Book Image

Linux Shell Scripting Essentials

By: Sinny Kumari, Khem Raj

Overview of this book

Table of Contents (15 chapters)
Linux Shell Scripting Essentials
About the Author
About the Reviewers

Using bash startup files

Until now, to perform a task or set anything for a given shell, we had to execute the needed commands in a shell. One of the main limitations to this approach is that the same configuration won't be available in a new shell. In a lot of cases, a user may want that whenever he or she launches a new shell, whereas instead a new customized configuration on top of the default configuration is available for use. For customizing bash, three files are available in a user's home directory that get executed by default whenever a user launches a new bash. These files are bashrc, .bash_profile, and .bash_logout.


In a graphical system, mostly a non-login shell is used by a user. To run a non-login shell, we don't need the login credentials. Starting a shell in a graphical system provides a non-login shell. When a bash is invoked in non-login mode, the ~/.bashrc file is invoked and the configuration available in it is executed and applied in any bash shell being launched...