apt-get update&upgrade unmet dependency: python3-plainbox
1520
How to install software or upgrade from an old unsupported release?
24603
apt-get upgrade gives "403 forbidden" error
13107
How to install updates via command line?
145400
Error when trying sudo apt-get update - Python related?
108510
apt-get update very slow, stuck at "Waiting for headers"
94171
Why Does Software Updater Say No updates Available, but apt-get upgrade Shows updates available?
155918
What information do I need to solve an APT dependency issue?
105770
Cannot use apt-get/dpkg -- Input/output error
11166
"Require Installation Of Untrusted Packages" while upgrading with the update manager
135575
How to fix a "Failed to fetch binary-armhf/Packages" error during apt-get update?
96696
timeout errors in apt-get update/install
1632
How do I fix a "Failed to download package files" error?
127766
how to upgrade my Debian package with minor changes
80899
"no public key available" on apt-get update
139458
How to download packages from a command-line given repository?
41519
What can I do if a package is not available on the newest version of Ubuntu (18.04) but is available on older versions?
17645
Unable to upgrade pip