Linux | 2DayGeek

Mapping SAN LUN and associated VxVM disks on Linux

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 …

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 - Leave a 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 …

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 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 …

Linux / Linux Administration / Linux Advanced Commands / Linux Commands

How to Resize an Online Multipath Device on Linux

September 25, 2022April 23, 2023 - by Rasool Cool - 2 Comments.

Disk space on Linux can be expanded by adding a new LUN or resizing an existing LUN on the system. In most cases, the online resizing of the multipath device …

FAQ / Linux / Linux Administration / Linux Basic

How to create a systemd service unit file in Linux

June 15, 2021June 15, 2021 - by Magesh Maruthamuthu - 1 Comment

systemd is a system and service manager for Linux operating systems. When you install any application from a repository, it will drop a service unit file into the systemd directory …

FAQ / Linux / Linux Administration / Linux Commands / Log Analysis / Log Monitoring / Log Viewer

How to use journalctl to analyze logs in Linux

March 18, 2021March 22, 2021 - by Magesh Maruthamuthu - 1 Comment

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 …

Linux / Linux Administration / Linux Basic / Linux Commands / Shell Script / User Management

How to lock & unlock multiple users in Linux

February 23, 2021February 24, 2021 - by 2daygeek - 4 Comments.

‘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 …