Systemd – Introduction to system admin

This article is my own and based on various other sources from the internet. If you have something to say please provide your feedback in the comment section below. what is systemd: systemd is a service manager/init process used to bootstrap the userspace and manage all process. Already systemd is […]


bike trip to ooty

So…. I thought of a bike trip after New Year. This time taking my wife on the trip. So I was thinking something short in distance something less than 150 km, then Ooty comes to my mind. Then we both decided to go on a trip from Coimbatore to Ooty. […]


Pythonify vim

I been using vim editor for a while now . VIM is one of the highly configurable text editor, It can be used as IDE for bash,perl,python and many other. In this post i am going to provide some details about how to configure vim as a python IDE. I […]


Trip to wild – Bannerghatta National Park

I have been trying my hand in photography for a few months now. Recently during a trip to Bannerghatta National Park i managed to shoot some of the wildlife using my DSLR camera. Here are few snaps from my recent trip to Bannerghatta National Park.   Tiger’s tongue is so […]


LVM Snapshot

LVM snapshot is a special type of logical volume which contains all the data in the source logical volume at the time of snapshot creation. Once the snapshot is created, all the changes made to the source local volume will only be saved in snapshot.So the amount of space necessary […]


Removing a physical volume

3 cases for removing the physical volume    If PFree and Psize are equal which means the physical volume don’t have any data in it , so we can directly remove the physical volume from the volume group by vgreduce and then remove the physical volume by pvremove. Example in the […]


Extending a volume group

Size of volume group can be extended by adding more physical volume to the group. No downtime is required for extending a volume group Step 1: Creating a physical volume [root@server1 ~]# pvcreate /dev/sdf Physical volume “/dev/sdf” successfully created [root@server1 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sdb VG01 […]


Creating a logical volume

Architecture : Step 1: Creating physical volume Following disk will be used to create the logical volume /dev/sdb – 10GB /dev/sdc – 10GB /dev/sdd – 10GB /dev/sde – 10GB [root@server1 ~]# fdisk -l |grep “Disk /dev/” Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 sectors Disk /dev/sdb: 10.7 GB, 10737418240 bytes, […]


Linux LVM explained

Logical Volume Manager (Linux): Logical Volume Manager is a tool used for managing storage devices in Linux. LVM provides a software layer on top of the storage devices which creates an abstraction of continuity, so that the data not tied to the actual physical storage and partition that resides on. […]


Reducing a logical volume

Downtime is required for reducing a logical volume Step 1: List the logical volume and check the current size. Here i am going to reduce the LV01 to 10G from the current size 30GB [root@server1 ~]# lvs LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert LV01 VG01 […]