I have a raspbian stretch image which is of release date 2018-03-13. Is there any command I can use to upgrade it to the latest release os image of raspbian. I tried with apt dist-upgrade but the release date was same. I am checking the release date using cat /boot/issue.txt.
Is there any command available which I can you to upgrade the raspbian os image to its latest release version.
Thanks
With sudo apt update && sudo apt full-upgrade you will upgrade the system by removing/installing/upgrading packages. That's the option defined for apt. I don't know if dist-upgrade from apt-get do exactly the same. In man apt you can read:
full-upgrade performs the function of upgrade but will remove currently installed packages if this is needed to upgrade the system as a whole.
I think this will not include new packages automatically that are included into the image of the new version so you may install them if you want. But you haven't needed them before otherwise they were upgraded. To be really sure that you have all new features you have to compare with the Release Notes.
