Password Policy

All passwords given to you by services or admins should be changed immediately after the first login.

System passwords must be at least 8 characters long, include one lowercase letter, one digit and either an upper case letter or special character (like !"#$% etc). Also, the password must not contain any dictionary words, and it must differ from the previous password to a certain extent (not the reverse of the previous password, the previous password with changed cases etc).

Don't let anyone know your password for Blinkenshell. Don't write it down at places where others might be able to view it, especially not on your computer (a paper note in your wallet might be a good idea.)

It's not recommended to use the same password for different services.

And lastly, change your password ASAP (use passwd) if you know that somebody else knows it!