Hi,
In this post I am going to talk about upgrading ubuntu from its current version to the next higher version...recently I have made a upgrade of my personal OS Ubuntu 22.04 LTS to 24.04 LTS
This post is going to be very generic, which means that the procedure description here can be applied on any version of ubuntu to be upgraded to its higher version.
Updating the current version of ubuntu...
Open up a terminal and start firing the commands given below to update your current version of Ubuntu to its recent state...
$ sudo apt update
The above command would prompt you to key in the password...please provide the one associated with the user.
$ sudo apt list --upgradable | more
$ sudo apt upgrade
Wait till the update process is completed...
Rebooting the system...
Now its time to reboot the system, use the following command in the terminal to reboot.
$ sudo reboot
Actual Upgrade
Soon after the reboot...use the following command to upgrade the current version of Ubuntu to the recent version...
$ sudo apt install ubuntu-release-upgrader-core
this command is the starting point of the upgrade process...this would popup a window for the series of the actions to be made manually and approximately the time taken would be 60 minutes....mine was little shorter for upgrade completion...
Confirmation...
The above upgrade process completion would be confirmed successful by checking the release upgrade...
use the following command(s) for your confirmation...
$ grep 'lts' /etc/update-manager/release-upgrades
or
$ cat /etc/update-manager/release-upgrades
either case...you would find the following line in the release upgrade...
Prompt=lts
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