The latest version of Ubuntu is 20.04.lts and is named as “Focal Fossa”. To start with the upgrade the first and foremost thing is to backup the server . The rest procedure is as follows: The current os version can be recorded from /etc/os-release file. Once done with backup we need to update all packages of ubuntu 18.04 to latest by running the command sudo apt update After successful update just upgrade all the installed packages to latest using the command sudo apt upgrade Now remove all unused old kernels as they wont be used any further removing them might help us clear some space on the disk. sudo apt --purge autoremove Install update-manager-core package if not already installed. Now upgrade the system to latest lts. sudo do-release-upgrade If you come across an output like this : Checking for a new Ubuntu release There is no development version of an LTS available. To upgrade to the latest non-LTS development release set Prompt=normal...
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