Basically never do a (sudo apt-get) dist-upgrade even if you are told by Clem
Well, not until you have checked a few things.
To explain this I'll make a brief description of the different commands in this area
apt-get update
This updates your list of available packages, but apart from that it does not change anything
apt-get upgrade
This reeds the above mentioned list and upgrades the files you already have
apt-get dist-upgrade
Does the same as upgrade, but it also adds files you do not have, even if it could cause a conflict and removes files that are no longer in the list of available packages or causes conflicts, regardless of if they are dependencies for other files.
The commands must of course be preceded by sudo, in Daryna and later you can use just apt and you will be asked to give your password.
The commands are "stupid" as they work on files, or rather packages, not on applications so you can see that dist-upgrade has the potential to hose your system, but it is necessary on occasion.
And now to the conclusion
If you have an up to date system, and no other repositories enabled than in the standard sources.list
and the repositories of something you want to update (could be the Romeo repo) then it's probably safe to do a dist-upgrade
Or - first apt update and apt upgrade, use the system some time to see that it's OK and first then apt dist-upgrade.
And if you wonder why I recommend this it is to catch possible errors from the upgrade before venturing into a dist-upgrade (which, as stated, will do an upgrade as well).
Addenda, not necessary to read
When you've read this you may understand why we did not want people to press the "Update to version 7.xx" in the Ubuntu update manager. This downloads a new sources.list with the repos of the version mentioned and then does a dist-upgrade....









