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CentOS

How To CentOS / RHEL 7 Install Gnome Desktop Using Yum

I installed minimal CentOS Linux 7.x on my laptop. How can I install Gnome desktop GUI on a RHEL (Red Hat) 7 or CentOS Linux 7 system using command line option?
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Sysadmin because even developers need heroes!!!

RHEL / Centos Linux 7: Change and Set Hostname Command

I‘m a new RHEL (Red Hat Linux) and/or CentOS Linux 7 server user. How can I change the hostname in CentOS 7 using a command line option?
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CentOS/RHEL Use yum Command To Downgrade or Rollback Updates

I‘m a CentOS Linux 7.x server user. How can I use yum command to downgrade or rollback package updates on a RHEL (Red Hat)/CentOS/Scientific Linux server?
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RHEL / CentOS Linux 7 Enable Ping Access In Docker Container

I’m using RHEL 7.1-4 container on a RHEL /CentOS Linux 7.x server. However, I’m unable to ping external site/IP address using the ping command. I’m getting the following error on screen:

ping: Operation not permitted

How do I fix this problem?
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How To Mount a Remote Directory With SSHFS on a Linux

How can I mount a remote directory with ssh on a Linux bases system? How do I use SSHFS to mount remote file systems over SSH on a Ubuntu or Debian/RHEL/CentOS/Arch Linux system?
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Linux Change Disk Label Name on EXT2 / EXT3 / EXT4 File Systems

How can I modify partition labels on a Linux operating systems? How to change disk name on the ext4 file system on a Ubuntu Linux using command line?
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Ubuntu Linux: Edit and Open Files That Require Administrator Privileges

There are certain files in Ubuntu Linux (or Unix-like systems) that only root user access or edit. How can I edit and/or open files that requires admin (root) access on a Ubuntu Linux?
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Bash: Reissue And Repeat A Long Command Without Retyping It on a Linux, OS X & Unix

I‘m a new Ubuntu Linux user. In Linux, Apple OS X or Unix-like systems, how do I reissue or repeat a long command without retying it?
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How To Patch and Protect Linux Server Against the Glibc GHOST Vulnerability # CVE-2015-0235

A very serious security problem has been found in the GNU C Library (Glibc) called GHOST. How can I fix GHOST vulnerability and protect my Linux server against the attack? How do I verify that my server has been fixed against the Glibc GHOST vulnerability?
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How To Change Timezone on a CentOS 6 and 7

I set my time zone to ‘America/New_York’ on a CentOS Linux 7 server. I want to see date and time in my timezone in log files. How can I change the current timezone from ‘America/New_York’ to ‘America/Chicago’ using command line?
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