GNU/Linux Ubuntu 20.04 Chroot with Network 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.
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 QuickStart with Command Line on Ubuntu Linux
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. 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
4. Mounting Proc
Bind Process Information Pseudo-filesystem
With:mount --bind /proc /mnt/newroot/proc
Binding consists in Cloning the actual Directories Tree in a Different Point.5. Binding Devices
Then start Binding the Devices directory
With:mount --bind /dev /mnt/newroot/dev
6. Binding Sysfs
And after Bind sysfs Virtual File System
With:mount --bind /sys /mnt/newroot/sys
7. Binding Temporary
So Bind the Temporary for the New Root
Playing:mount --bind /tmp /mnt/newroot/tmp
8. Enabling Network
Now to Enable Networking
Simply Copy resolv.conf File:cp /etc/resolv.conf /mnt/newroot/etc/
In Case prompted then Confirm to Overwrite the Existing one.9. Chrooting
Finally, Chroot into the New Target
With the Bash Shell:chroot /mnt/newroot /bin/bash
Now Check your Actual Location with:pwd
You’ll be Certified to be on the New root ‘/’ location.
And finally, Test Networking with:ping -c 3 google.com
In the Output you should find confirmation of a Working Internet Connection.
Congrats and Happy Chrooting! ;)