New Linux User

10 Linux Shell Tricks You Don’t Already Know. Really, we swear.

by Kyle on June 23rd, 2007

The Venture Cake Weblog introduces 10 uncommon terminal commands — although you won’t be needing these commands on a daily basis, they’re good to keep in your back pocket. Included in the ten is one particularly interesting command that demonstrates how to generate a random password for a new user.

5. Set a Random Initial Password, That Must be Changed
There’s a lot of organizations who have nice, secure policies for passwords. Passwords stored on Windows machines. Linux is either not covered by the policy or the policy is routinely violated – people have idea about Linux authentication (most people don’t quite understand PAM, and Linux admins don’t often realize Linux can quite happily authenticate to Active Directory) and once upon a time, the OpenSSH developers didn’t like PAM (that’s since changed).

To set password that must be changed upon first login.

umask u=rw,go=
openssl rand -base64 6 | tee -a PasswordFile | passwd –stdin joe
chage -d 0 joe

The password is saved to PasswordFile , which only your own account can read. Then contact via some medium you consider relatively secure – like a phone call or encrypted email and them tell their initial password.

10 Linux Shell Tricks You Don’t Already Know. Really, we swear. - [Venture Cake]

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