My fresh Ubuntu install says I need some updates. Okay, but there are some problems.
First, it tells me to close the snap-store to update it, but the snap-store is not open.
1/
Okay, I'll try opening the snap-store to look for updates.
"This is getting out of hand! Now there are two of them!" -Nute Gunray
2/
Okay, let's try the gnome update.
It appears to be Schrödinger's update: available and not available at the same time.
3/
How about the snap-store update? Well, you can't update that while the snap-store is running.
Any ideas on how to install these updates?
/4
Maybe use Software Updater? Nope, it doesn't think there are updates.
Are there? If so, how do I apply them? If not, how do I remove the notifications from the list in the snap store?
/5
@peterdrake Hmm, all I can think of is to use the good old command line:
sudo apt update && sudo apt upgrade && sudo snap refresh
@JensHannemann That happily ran, but the snap store and the notifications under the clock both think I still have updates.
I assume the &&s in your command are short-circuited so the later parts run only if the first parts ... succeed? My only confusion here is that I would expect a process to return 0 (false) if it succeeded.
@peterdrake You are right. And yes, as counterintuitive as it is, in POSIX and may other systems, a non-zero return code indicates an error and a zero return code indicates success. That's why the traditional C hello world program ends with `return 0;`.
@JensHannemann That's why I'm confused. If you run
foo && bar
and foo returns 0 (because it succeeded), won't the shell essentially say, "Welp, the first part of this expression is false, so no point in running the second part!"?
@peterdrake No, because the shell does not think of that as an expression, but rather a conditional sequence of commands. You can request evaluation of an expression explicitly. Bash knows the `eval` command for that, but there are different ways for different shells.