To remove a Physical Volume (PV) from a Volume Group (VG) in LVM (Logical Volume Manager), follow these steps: 1. Check the Current Setup First, identify the Volume […]
articles
What is .rpmnew & .rpmsave files in Linux?
In Linux, .rpmnew and .rpmsave files are created by the RPM Package Manager during the installation or upgrade of software packages. These files are part of RPM’s mechanism […]
howtos
How to install latest python with openssl on CentOS/RedHat/Oracle Linux 7
The tutorial used here is done on Oracle Linux 7. Download and extract the latest python Install the pre-requirements As latest python is not compatible with the default […]
howtos
How to rewrite sender address in postfix using canonical_maps
To rewrite sender addresses in postfix using canonical_maps, you need to configure postfix to use a canonical map file. Create the canonical map file: First, create a file […]
articles
What does “mounted filesystem with ordered data mode. Opts: (null)” means?
The message “mounted filesystem with ordered data mode. Opts: (null)” is typically a kernel log or system message related to the mounting of a filesystem on a Linux […]
articles
IP Address Classes
IP address classes were a part of the original addressing scheme defined in the Internet Protocol (IPv4). However, the concept of classes is largely obsolete due to the […]
articles
Chrony vs NTP
Chrony and NTP (Network Time Protocol) are both protocols and software implementations designed to synchronize the clocks of computers on a network. They aim to ensure that the […]
articles
Why Kdump generates incomplete vmcore?
Kdump is a kernel crash dumping mechanism in Linux that allows you to capture a memory dump (vmcore) when the kernel encounters a critical error or crashes. The […]
issues
growpart fails with “NOCHANGE: partition 2 is size 61888512. it cannot be grown”
Trying to extend partition fails with following error: Check the partion You can see /dev/vda consists of 3 partitions. You can extend only the last partition (/dev/vda3 here). […]