• Shell variables
• TERM
• DISPLAY
• PS1 & PS2
• PATH
• Environment variables -- export
• Redirection of output to arglist.
• Execution control structures:
• if statement
• for statement
• switch statement

Shell Profile & .kshrc

Shell start-up script run at login time

.profile

Script run at the start of every shell

.kshrc (or .bashrc etc.)

• Use to set PATH variables and prompts
• Use to set aliases and define functions
• Used to configure machine dependant options.