Articles

 Find the IP address of the client in an SSH session

You could use the command: server:~# pinky that will give to you something like this: Login...

 How to add welcome message when SSH start?

You need to change the contents of /etc/motd. Unfortunately, by default, /etc/motd is a link to...

 How to change root password when SSH logged in

Run the following command: passwd Now type your new passwordOnce done, retype new passwordDone!...

 How to clean YUM cache in CentOS / RHEL?

What is yum?The Yellowdog Updater, Modified (yum) is an open-source command-line...

 How to extract .tar.gz files in Linux/UNIX OS

A tarball is a group of files that are bundled together using the tar command. Use the...

 How to install Pinguzo on any Linux/UNIX OS

Login to Pinguzo panel using Softaculous account or create an account of Pinguzo To add new...

 How to restrict direct root access in Linux

We can do it just in two steps. Step One: At first we will create new root user as follows (for...

 How to use Postfix as Relay for Mailgun SMTP Relay

Mailgun is a popular SMTP Relay/API service, one of my favorites. For transactional emails, I...

 Troubleshooting High I/O Wait in Linux

Linux has many tools available for troubleshooting some are easy to use, some are more advanced....

 Usages of kill cmd, how to terminate processes

One of my biggest pet peeves as a Linux sysadmin is when I see users, or even other sysadmins...