Linux and Unix, Open Source, Linux Howtos
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 in LVM 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
Sometimes we might need to kill a user session in Linux based on requests, which can be done by sending SIGNALS with kill command. We need to send one of …
How to Kill user sessions in Linux Read More
root user is a privileged user in Linux, which is similar to an administrator in Windows. All kind of administrative operations can be performed using root user privilege hence it …
How to become a ‘root user’ in Linux? Read More
Generally, a file system must be mounted on a Linux system to access the contents. When adding a new hard disk to your system, you may need to use the …
How to Mount and Unmount File System/Partition in Linux Read More
Link is a mechanism of creating a shortcut to the original file or directory which contains information about its files or directories. What is Soft link? A symbolic link, also …
Difference between Soft link vs Hard link Read More
You may have missed to delete some files that are no longer needed on your computer in some directory. It could be either in “Download” or any other directory that …
How to Remove files older than ‘N’ days using Tmpwatch/Tmpreaper on Linux Read More
Well-known services in Linux can be added on boot time without any problems, because most of them come with their own script, which is done using ‘chkconfig’ and ‘systemctl’ commands. …
How to execute a command or script at reboot or startup Read More