Use the Backspace key to erase characters. Press Return or Enter to issue one of those commands again. If you type a filename as part of a UNIX command and you have typed enough of it to uniquely identify the file, press the TAB key to make bash fill in the rest of the filename for you. Using Aliases and Functions Bash allows you to define aliases and functions. With the alias command, you can create abbreviations or new names for UNIX command sequences.
Functions are like aliases, except that they allow more complex expres- sions.
An alias command consists of the command alias, the name you want to give the alias, and a definition that contains the actual command for which you are creating an alias. A sample alias command, for running a perl script called txt2html.pl is shown below. When this alias works, you would be able to type txt2html at any UNIX prompt and the script called txt2html.pl in doylez's locker directory will run. There is an on line manual page on bash . To read it, enter the command man bash at a UNIX prompt .