Linux Administration

How to Create Users using Shell Script in Linux

December 27, 2024December 27, 2024 - by Jayabal Thiyagarajan - Leave a Comment

Creating users in Linux/Unix is a straightforward task. However, adding multiple users across multiple servers can be a time-consuming task, so you can automate this with a shell script to …

Mapping SAN LUN and associated VxVM disks on Linux

Cluster / Cluster File System / Linux / Linux Administration / VCS / Veritas Cluster

How to find SAN LUN Mapped to VxVM Disk in Linux

July 19, 2023July 22, 2023 - by Prakash Subramanian - Leave a Comment

We’ve written several articles in the past to find LUN ID mapped to Block device/disk, but when you’re managing a VCS cluster there are some situations where you might want …

Cluster / Linux Administration / VCS / Veritas Cluster / VxFS / VxVM

How to Extend Veritas File System (VxFS) in Linux

July 16, 2023July 16, 2023 - by Jayabal Thiyagarajan - Leave a Comment

Extending the VxFX file system is a routine task for a Linux/Unix administrator and this can be done online with a few steps described in the below article: In this …

Mapping SAN LUN, Disk, LVM and FS in Linux

Bash Script / Linux / Linux Administration / Shell Script / shell-scripts

How to map LUN, Disk, LVM and FileSystem in Linux

July 9, 2023July 10, 2023 - by Rasool Cool - 1 Comment

There are situations where you want to map storage LUN (Logical Unit Number), Block Device, LVM (LV & VG names) and File System (FS) information for FS expansion or Disaster …

Linux Administration / Red Hat / Red Hat Enterprise Linux / RHEL

How to Upgrade from RHEL 7 to RHEL 8

June 13, 2023June 17, 2023 - by Prakash Subramanian - Leave a Comment

As you would have already known that the Red Hat Enterprise Linux (RHEL) 7 maintenance support phase will come to an end in June 2024. It’s time to prepare for …

Mapping SAN LUN to Physical Disk and FileSystem in Linux

Bash Script / Linux / Linux Administration / Linux Advanced Commands / Shell Script / shell-scripts

How to map SAN LUN, Disk and FileSystem in Linux

June 3, 2023June 3, 2023 - by Rasool Cool - Leave a Comment

For some requirements, you may need to find a block device mapped against a logical unit number (LUNs) and filesystem (FS) for FS expansion or disaster recovery (DR) activity. Similar …

Creating Shared VxFS Filesystem in Veritas on Linux

Cluster / Cluster File System / Linux Administration / VCS / Veritas Cluster / VxFS / VxVM

How to Create Shared VxFS FileSystem on Linux

May 7, 2023May 16, 2023 - by Jayabal Thiyagarajan - Leave a Comment

Veritas is one of the best solution for concurrent write (Veritas Cluster Volume Manager (CVM)) and it allows up to 128 nodes in a cluster to simultaneously access and manage …

Creating VxVM Volume and VxFS Filesystem in Linux

Cluster / Linux / Linux Administration / VCS / Veritas Cluster / VxVM

How to Create VxVM Volume and Filesystem in Linux

April 3, 2023April 3, 2023 - by Jayabal Thiyagarajan - Leave a Comment

Veritas Cluster (VCS) is the most popular among others because I have seen VCS running on many mission critical systems, especially core banking systems were running on Veritas clusters. In …

Linux / Linux Administration / Linux Advanced Commands / Linux Commands / LVM

How to move a Volume Group from one system to another

February 25, 2023February 25, 2023 - by Jayabal Thiyagarajan - Leave a Comment

There are situations where we would be required to move a whole volume group from one system to another system for some requirement. As part of this, it also moves …

Removing SAN disk or Storage Device (LUN) from Linux

Linux / Linux Administration / Linux Commands

Six Simple Steps to Remove a Storage Device (LUN) from Linux

February 19, 2023February 20, 2023 - by Prakash Subramanian - 1 Comment

There are situations where a storage device or LUN must be removed from running system without any issue. This happens for a variety of reasons, but most commonly, when the …