If you use the same command often, you might get tired of typing it.
bash lets you write shorter _aliases_ for your commands.
Say you always use the -almost-all and -color=auto options to ls.
You quickly get tired of typing ls -almost-all -color=auto. So you
make an alias:
alias myls=’ls -almost-all -color=auto’
Now you can type myls instead of the full command. To see what myls
really is, run the command type myls. To see a list of aliases
you’ve defined, simply type alias on a line by itself.
[Illustration: Figure 6.3: Redirecting output]