Filtering DNS with Tcpdump on Port 53
If you’re a Linux system administrator, then you’re probably familiar with DNS, which is a critical component of networking. TCPdump…
3 Ways to make Top Command sort by Memory
Top is a very powerful command to periodically display a sorted list of system processes. The default sorting key is…
Filtering ICMP Packets with Tcpdump
Tcpdump command in Linux can be used to capture ICMP packets. We will start with ICMP protocol introduction and then…
Why “Free Memory” on Linux Is the Wrong Number to Watch
Ask a Linux server “how much memory is free?” and the honest answer is “it’s complicated.” Modern Linux deliberately uses…
How Userdel Works In Linux
Userdel command can be used to delete a user and related files in Linux. In most Linux distributions, the user…
4 ways to use Linux tar Command
The tar command in Linux is used to bundle up multiple files and/or directories. It’s similar to the zip command.…
4 Useful Examples of Linux Passwd Command
Passwd is a basic Linux command to change the user password on Linux. A root user can change the password…
How tar works in Linux
The tar command in Linux is used to bundle up multiple files and/or directories. It’s similar to the zip command.…
3 Ways to find largest files in Linux
In this blog post, we will discuss three different ways to find the largest files on a Linux system. This…
Find Process Using Most CPU and Memory in Linux
We can use this command to find out which process uses the highest CPU or Memory in Linux. # ps…