Increasing or Decreasing the Size of Static Partition in Linux [RHEL8] .i.e. How to resize Partition on RHEL

Previously I shared with you how you can reduce or extend the partition using LVM. 

Here I am going to show how to increase the size of the static partition dynamically without losing any data. Firstly I have attached the 6 GB hard disk and I already had 10 GB.

We can see this using fdisk -l command.

Step1: We have to create partition of disk /dev/xvdf (6GB). The steps that need to follow are:

1. fdisk /dev/sdb: to go inside the disk
2. n : for new partition
3. p : for primary partition
4. w: to save the created partition.

Step 2: We can use the lsblk command to list the information of blocks. The next step is to format the partition

Command:- mkfs.ext4 /dev/xvdf1

Step 3: Create Directory task and mount it to disk /dev/xvdf1

Command: mount /dev/xvdf1 /task

Step 4: Creating a file name staticfile.txt. The file size is 184M.

Now We have to Increase the size of static partitions without losing our data of staticfile.txt

?? Increase The Size ??

Step 1: Unmount the partition. Command: umount /dev/xvdf1 /task

?Step 2: Delete the Partition

d: it is for deleting partition

w: to save the changes

Step 3 :

Increase The Partition with 5GB. Here you will come in front of concept File Signature.

File Signature or Magic Number is a protocol set of constant numerical and text values used to identify file format. In other words, every file type requires a unique signature in order for an operating system to recognize it, classify it and show it to an end user.

In my case I am not removing the ext4 signature. We want our data safe! So, select No. (N)

Step 4: Cleaning the bad Sector

Command: e2fsk -f /dev/xvdf1

Step 5: Format only extended part

Command: resize2fs /dev/xvdf1

Step 6: Mount partition to directory

Command: mount /dev/xvdf1

Step 7: Let Us check our data. The file is safe! The file size is still 184 M.

THANK YOU SO MUCH !!