Chroot Ubuntu 20.04 – Step-by-step

March 14, 2020 | By the+gnu+linux+evangelist | Filed in: Tutorial.

GNU/Linux Ubuntu 20.04 Chroot Guide

Hi! The Tutorial Shows in Easy Steps How to Properly Chroot Ubuntu 20.04 Focal LTS GNU/Linux Systems with Network Enabled.

Hence, Chrooting in Ubuntu 20.04 consist in Changing the root Directory on a Different Partition from the Boot System.

And Chroot is also defined as the Operation that Changes the Apparent root Directory for the Current Running Process and their Children.

Especially relevant: the Chroot is usually achieved Starting up the System with a Live OS Media.

As a Result you’ll be Able to Operate on the New Root Device pretty like a regularly Started System with Networking.

Step-by-step Chroot Ubuntu 20.04 Easy Guide - Featured
  1. 1. Unmounting Target

    Then Find Out the New Root Target Drive
    First, Login as SuperUser to make easier the Commands execution:

    sudo su
    Or:

    su –

    Then look into the List of the Mounted devices with:
    df -h

    If You can Not to Find it then try Visually with GParted:

    gparted

    Possibly Unmount it with:

    umount /dev/sd[XN]
    Just Replace [XN] with the actual Device’s Identifier.

    How-to Quick-Start with Command Line on Ubuntu Linux

    Command Line Ubuntu QuickStart Guide
  2. 2. Mounting Root

    Mount the New Root Target Device
    Firt make a New Directory by:

    mkdir /mnt/newroot
    And then to Mount:
    mount /dev/sd[XN] /mnt/newroot
  3. 3. Mounting Pseudoterminal

    Hence Mount the Pseudoterminal Slave
    First, make the Target folder:

    if [ ! -d "/mnt/newroot/dev/pts" ]; then mkdir /mnt/newroot/dev/pts; fi
    And then Mount it with:
    mount -t devpts none /mnt/newroot/dev/pts

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