Linux tee command with examples
The tee command reads standard input (stdin) and writes the result to standard output (stdout) and one or more files simultaneously. It basically displays the command output on the terminal …
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How to configure firewalld rules in Linux
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 …
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How to use journalctl to analyze logs in Linux
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 …
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6 best tools to monitor disk IO performance in Linux
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 …
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How to lock & unlock multiple users in Linux
‘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 …
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How to Automatically Accept SSH Key Fingerprint
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. …
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How to view images from Linux terminal
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 …
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How to List and Remove a GPG key in Ubuntu
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 …
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How to Remove Physical Volume from a Volume Group in LVM
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 …
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How to scan\detect new LUN’s & SCSI disks in Linux?
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, …
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