Used frequently, bash aliases can make working on the Linux command line a lot smoother and easier, but they can also be complicated and hard to remember. This post examines how you might make your aliases work for you rather than vice versa.
In general, aliases are especially good for:
simplifying commands that are long and overly complex
remembering commands with odd or complicated names
saving time using commands that you use very often
What you need to keep in mind is that:
aliases can themselves be hard to remember
giving an alias the same name as a regular command can be a good thing or a bad thing (more on this shortly)
How to create an alias
Use the alias command and remember to add it to your ~/.bashrc file so that it will still be waiting for you whenever you login.
Source:: Network World – Data Center