Force SSH Client To Use Given Private Key ( identity file )

in Categories last updated May 17, 2010

Recently, my desktop hard disk crashed. So I reinstalled Linux and created a new set of private RSA keys for authentication. However, two of my remote UNIX servers still uses old DSA keys. I do not remember root password for those servers. I do have backup of private and public DSA keys and currently stored in /backup/home/user/.ssh/id_dsa and /backup/home/user/.ssh/id_dsa.pub. How do I force my ssh clients to use identity file /backup/home/user/.ssh/id_dsa to get back to my remote UNIX servers?

UNIX / Linux: Send E-mail When sudo Runs

in Categories , , , , , , , , , , , last updated July 1, 2009

I‘m not told to use the root user to perform activities that do not require it. I’ve configured sudo for myself and for other web developers so that they can restart MySQL or Apache web server. How do I send email when sudo run by one of my user? How do I keep track of user login done via sudo command?

Lost MySQL Admin Password

in Categories last updated March 25, 2010

I lost mysql admin (root user) password. How do I reset a lost MySQL admin (root) password under UNIX or Linux or BSD operating systems?