You can use aliases to shorten long commands that you frequently type, or to modify the way commands usually work. The command rm in UNIXese means remove file . It is fairly easy to make a mistake, and accidentally delete all of your files. The -i modification tells UNIX to give you a chance to confirm the removal before it does it. We strongly recommend this addition.
Aliases can also make changing directories and other commands less cumbersome.
We advise caution when you create aliases. First, you want to make sure that you do not use a name for an alias that is already a valid command. Second, you would not want to create an alias that would make it easy for you to do dangerous things - like delete my files . Some Useful Commands Following is a list of commonly used commands, their meaning, and an example of syntax. Remember that the UNIX is case sensitive.