CentOS Howtos and Tutorials

Centos Linux tutorial for beginners and advanced users with special focus on security, firewall, web, mail, file and proxy servers in an enterprise environment (rss feed).

I do not want to use Apache server on a CentOS / RHEL 6 server. How do I uninstall and remove Apache (HTTPD) server using command line option on Red Hat Enterprise Linux / CentOS / Fedora Linux based server?

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How do I use bash auto complete features with various command on CentOS / RHEL / Fedora / Scientific Linux based systems?

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How can display a list of configured repositories under CentOS / Fedora / Red Hat Enterprise / Scientific Linux server operating systems?

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How do I configure serial console under CentOS Linux or Red Hat Enterprise Linux 6.x running on HP or Dell server?

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How do I update all installed packages on Linux operating systems? How do I perform upgrading packages through a network on Linux operating systems?

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I am a new Linux user and created couple of groups on server. I need to find out all members of a group called “ftponly”. How do I list all members of a group on Linux or Unix-like systems?

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I am a new Red Hat Enterprise Linux server sysadmin. How do I change default sshd tcp port # 22 to 3033 on RHEL v5/6? How do I modify SELinux to allow port 3033 and how do I saftly update firewall on RHEL to allow tcp port # 3033? How do I change ssh port on Redhat Linux operating system?

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