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C Shell Initialisation Files:

1. Commands in /etc/.login are executed first.
2. Commands in $HOME/.cshrc are executed. (also executed each time a new shell/CDE session is started)
3. Shell executes commands in $HOME/.login file (usually terminal type/environment commands)
4. Once the above is complete, the shell starts reading commands from the default input device, the terminal.
5. If $HOME/.logout file exists, this is executed when the C shell terminates.

Bourne Shell Initialisation Files:

1. Commands in /etc/profile are executed first.
2. Commands in $HOME/.profile are executed (usually terminal type/environment commands)
3. Once the above is complete, the shell starts reading commands from the default input device, the terminal.

Korn Shell Initialisation Files:

1. Commands in /etc/profile are executed first.
2. Commands in $HOME/.profile are executed (usually terminal type/environment commands)
3. If present, commands in $HOME/.kshrc are executed. This file gets read each time a new Korn shell is started after login.
4. Once the above is complete, the shell starts reading commands from the default input device, the terminal.

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This post is tagged Bourne, C, Initialisation, Korn, Linux, Shell, Solaris, UNIX