Commands

Extend partition size

1. Get PV (Physical Volume) name (Ex: /dev/sda1)

   sudo pvs

2. Resize the PV

   sudo pvresize /dev/sda1

3. Get root logical volume name (Filesystem value of / row; ex: /dev/mapper/ubuntu--vg-root)

   df -h

4. Expand logical volume

   sudo lvextend -r -l +100%FREE /dev/mapper/ubuntu--vg-root

Source:

• Can't resize a partition using resize2fs

Create sudo user

1. First create the user:

   adduser sammy

2. Add user to the sudo group:

   usermod -aG sudo sammy
   

3. Then either logout and log back in, or switch to the user:

   su - sammy

Source:

• How To Create A New Sudo Enabled User on Ubuntu 22.04

Replace text using sed

• sed -i 's/FIND_TEXT/REPLACE_TEXT/' file.txt