grep command

Linux / Unix: Tarball Delete ( remove ) File

by Vivek Gite on September 20, 2011 · 2 comments

How do I delete OR remove a single file from within a tar ball under Unix / Linux like operating systems?

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How do I delete old yum repositories and configuration files under RHEL 5 or CentOS Linux server?

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I’ve edited /etc/ssh/sshd_config to change the port number:

Port 1255

However, I’m getting an error as follows:

sshd[26792]: error: Bind to port 1255 on 192.168.1.100 failed: Permission denied

How do I change default OpenSSH port number from 22 to 1255 under RedHat Enterprise Linux server version 6 and SELinux?

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Linux Install an RPM File

by Vivek Gite on April 24, 2011 · 1 comment

I‘m a new Linux system administrator and wanted to perform software installation and maintenance. I’ve downloaded a file called awstats.i386.rpm and how do I install it under CentOS / RHEL / Suse / Fedora / Redhat Linux?

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Ubuntu Linux Stop a Process

by Vivek Gite on April 23, 2011 · 0 comments

How do I stop a process under Ubuntu Linux using command line and GUI tools?

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How do I see if my friends or coworkers are logged into the same Linux or BSD or UNIX (AIX, HP-UX, Apple OS X) server / workstation as I am from a command line?

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Bash Shell: Extract Digits From a String

by Vivek Gite on February 16, 2011 · 9 comments

How do I extract digits only from a given string under Bash shell?

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