The set and unset commands let you set and unset variables for your shell session. These variables control the way the shell handles certain situations. To display the shell variables that are currently set, type set . To turn on an option, enter:

set name

where name is the name of the option you want to turn on. If you want an option turned on for every shell session, put the set command in your .tschrc file.

To turn off an option, enter:

unset name