Three good choices are Essential System Administration , Unix System Administrator's Bible and Unix System Administration Handbook . Work through one of the many free online Unix system administration courses . Join a Unix system administration mailing list or newsgroup. When you start job hunting consider a large organization that will hire you as an entry-level system administrator. User Groups - A listing of Unix users groups around the world.
Membership includes access to local group meetings around the world and a job bank.
An online job searching site with many IT related job postings. Unix certification can help you break into the system administration job market by demonstrating your Unix knowledge to potential employers. In most cases it costs several thousand dollars. Certifications are almost always specific to a Unix flavor . Potential employers will want you to be certified in their flavor so a certification can limit your job searching options.