There are a lot of switches to a lot of commands and sometimes they're just too long to remember, or you're just too lazy to type them. In cases like this, you can use aliases. They're basically shorthand for commands you use a lot.

For instance, to log onto MySQL I have to use the command:

mysql --user=dangermouse --password=letmeinplox

It gets a little boring typing that over and over again. Also, PuTTY doesn't hide the password as you're typing it which can be a little dangerous. An alias fixes both of those problems. Just do:

alias my_mysql='mysql --user=dangermouse --password=letmeinplox'

"alias" is the command, "my_mysql" is the new alias/command I'm creating, and the rest is what I want it to be. So, now I can type "my_mysql" and it'll log me into my MySQL server.

If you pick a name for your alias that already exists, the original one will just got overridden.

Unfortunately, you'll have to create this alias every time you log onto your server. You can fix that by adding it to your .bashrc file, which is in your home directory, (so, mine is /home/shamess/.bashrc). That file should already have a few aliases in it, so take a look around it for examples.