Alias [making it permanent]

["nicolas angel" <n aggelidis gmail com>]

Hi,

i recently learned about aliases in command line, so i tried to make
some on my own.The problem is that i cant make them permanent, and in
the next reboot they all get lost.
e.g i type:

alias test='echo test @@@ test'

How can make them last.....


Thanks for your time,
Nicolas Ang