Important Linux servers
 

Can anyone suggest/list me the names of Linux servers which is very important for the Linux administrator job

Thanks in advance..

I assume you mean server operating systems. Here's my take on it, as a bystander: The two primary ones directly targed to the server market are

Red Hat Enterprise Linux (RHEL) probably dominates the commercial enterprise market and is a valuable certification. It is open source, but not free, in that Red Hat requires a licensing fee for support after a short trial period. Fedora is a user-oriented distro that Red Hat often uses for testing items before including them in RHEL.

CentOS is a free spin of RHEL. It tries to be indistinguishable from RHEL in how it works. If someone wants to study RHEL without paying a license fee, CentOS is a good place to start.

Ubuntu also makes a server spin. I have no idea how deeply it has penetrated into the enterprise (meaning "big business") space.

Thanks a lot Franbell

I'm using RHEL and CentOS right now. I even finished RHCE certication. But unfortunately, the market is very huge than the requirements in the RHCE curriculum and those I learned myself from google is not enough and even I m helpless cuz none of my friends and people near to me is in this field.

Could you please list me important servers to learn like DNS server, NFS server, kvm, sendmail etc which is very important for the Linux Administrator post in these days.

Thank you again.
waiting for reply...

I'm one of the sysops working solely with GNU/Linux servers (200+) at my work. Certifications have no actual usage, since most of them lack current knowlegde (changes throughout time etc). Practical experiences count more in this field of work.
As for services, it depends strongly on the pipeline setup, business type etc etc..
I work for an ISP, and therefor all Internet related services (e.g. DNS, HTTP, Clustering, SMTP/POP3/IMAP, Firewalling, FTP etc etc) are very important to have deep knowlegde/experiences with. So problems can be tackled quickly, and custom setups can be implemented fast.
Also in my field, fair networking related knowlegde is needed. (router configurations (juniper/cisco), subnetting, etc)

I'm really not the best qualified to answer your question. I can pass along this tidbit for what it's worth.

Several months ago, TLLTS did an episode in which one of the panelists, a sysadmin, discussed skills he considered it important for job applicants to have or at least know about in job interviews.

Besides the basics (file structure, basic commands, etc.), he mentioned regular expressions and cluster ssh as important admin tools that he expected applicants to know about, if not be proficient in.

Unfortunately, their website makes searching for the particular episode next to impossible, or I haven't found the secret decoder ring, or something.

Good luck.