Linux and Unix, Open Source, Linux Howtos
The firewall is essential for controlling the flow of network traffic in and out of the Linux server. It enables users to control incoming network traffic on host machines by …
How to configure firewalld rules in Linux Read More
systemd is the default system manager in most of the major Linux distributions, which comes with a new logging daemon called ‘journald’. For many years, system and kernel logs in …
How to use journalctl to analyze logs in Linux Read More
Disk IO issues (input/output) are one of the most common causes of poor performance on Linux system. This occurs when applications try to quickly read or write too much data …
6 best tools to monitor disk IO performance in Linux Read More
‘usermod’ & ‘passwd’ commands are used to lock or unlock one user account at a time, but you may need to write some small shell scripts to perform this action …
How to lock & unlock multiple users in Linux Read More
SSH Secure Shell is an encryption network protocol that provides secure encrypted communications between two hosts. It allows you to connect to a remote machine securely over an insecure network. …
How to Automatically Accept SSH Key Fingerprint Read More
Linux has many GUI applications for viewing images. But have you ever tried a CLI application to view them or do you know if one exists? Fortunately, while working with …
How to view images from Linux terminal Read More
Some time ago we wrote an article about removing the PPA repository from the Ubuntu system. The PPA repository keys will not be removed as part of removing the PPA …
How to List and Remove a GPG key in Ubuntu Read More
If a device is no longer needed by LVM, you can use the ‘vgreduce’ command to remove that physical volume from it’s volume group. The vgreduce command shrinks the capacity …
How to Remove Physical Volume from a Volume Group Read More
When building a Linux server, it is inevitable to map the storage to save any database and application files which require more storage space. To add storage to the host, …
How to Scan\Detect new LUN’s & SCSI disks in Linux Read More
As a Linux administrator, you may have noticed some requests from developers to convert files from DOS format to Unix format, and vice versa. This is because these files were …
How to Convert Text Files between Unix and DOS (Windows) Formats Read More