Hello Unix Forum,
I am trying to create an bash script to expand a LVM disk, I mean, trying to automatize all the process from the video bellow:
Youtube search:
How To Extend LVM Disk For Linux Virtual Machine On VMware
At this point, I am very new in bash script and I am facing this just as a try, I don't know if I will get the final result that I need.
Well, I am stuck at the grep option bellow:
#!/bin/bash
# Increase LVM Disk
echo"$(fdisk -l)"
echo Which disk you want to increase the size? "(Please provide the full path, Example: /dev/sda2):"
read disk1
diskcompare="$(fdisk -l | grep "$disk1 " -o --max-count=1)"
if [ "$diskcompare" == "$disk1 " ]; then
echo"Valid Disk."
else
echo"Invalid Disk."
fi
I would like to compare the path (disk1) with the fdisk -l command to check if it is a valid disk.
The problem is that the way that it is writed at the moment it accept you to continue the script if you not type the entire path, example:
[root@linuxtest ~]# ./test.sh
Disk /dev/sda: 16.1 GB, 16106127360 bytes, 31457280 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x000d345c
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 16777215 7339008 8e Linux LVM
/dev/sda3 16777216 31457279 7340032 8e Linux LVM
Disk /dev/mapper/centos-root: 14.2 GB, 14164164608 bytes, 27664384 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 859 MB, 859832320 bytes, 1679360 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Which disk you want to increase the size? (Please provide the full path, Example: /dev/sda2):
/sda2
Valid Disk.
[root@linuxtest ~]#
It should match only the exactly values /dev/sda1 , /dev/sda2 or /dev/sda3.
Any help will be welcomed
Ty!