Once the system boots after the upgrade, open the terminal type following to verify the Ubuntu version, :~$ cat /etc/lsb-releaseĪnother way to verify the Ubuntu version, Go to Settings and then choose About Once the upgrade process is completed successfully then we will get following messageĪbove output confirms that upgrade is completed, upgrade tool prompted us to press ‘y’ to restart the system. Now run the command to initiate the upgrade procedure, :~$ sudo do-release-upgrade -dĭuring upgrade procedure, it will prompt you couple of times to type “y” to update package repositories and sometime “enter” to confirm to proceed with upgrade, If, in the above command’s output, you got a message that “ There is no development version of an LTS available” then we can force the above command by passing the parameter “ -d” to look for the new latest LTS version. Run following command to view whether new 20.04 LTS version is available for your system. In case it is not installed run below command, :~$ sudo apt install update-manager-core -y Step 3) Start Upgrade Process Once your Ubuntu 18.04 LTS desktop is available after reboot, then it is recommended to remove unused kernels to free up the space from /boot partition, run beneath command: :~$ sudo apt -purge autoremoveĮxecute below command to install “ update-manager-core“, as it is required for upgrade, though on most of the systems it should be installed by default. Once all the updates are installed including the kernel then reboot your system :~$ sudo reboot Step 2) Remove unused Kernels and install ‘update-manager-core’ Rub below apt command to install all the updates of installed packages, :~$ sudo apt update
Let’s deep dive into upgradation steps Step 1) Apply all updates of installed packages We will get the output of above command something like below,
Also Read: How to Use TimeShift to Backup and Restore Ubuntu Linuxīefore start upgrading, let’s take a notw of existing Ubuntu Version, open the terminal and run below command, :~$ cat /etc/lsb-release