No installation candidate error when trying to install python-pypdf
743
How do I enable the "Universe" repository?
41844
Package Install via Market sometimes fails and gives seemingly random error message
30571
E: Package 'libpng12-0' has no installation candidate [ubuntu 16.10 Gnome]
29705
"errno 5 - input/output error" when trying to install Ubuntu
13729
fatal error :"python.h" no file or directory?
59096
python pip install psycopg2 install error
8185
Error when installing: "unable to find a medium containing a live file system"
11671
"Unable to locate package" while trying to install packages with APT
32098
How to install Python 3.6?
62476
E: Package '' has no installation candidate
32389
"cannot access archive: No such file or directory" when installing a package using dpkg
36079
How to install pip for Python 3.6 on Ubuntu 16.10?
104315
How to install pygame?
81080
ReferenceError: PF is not defined
144022
How to install a package from a local repository?
82044
Advice installing PSPP on Ubuntu 20.04
82481
How do you install python3.7 to ubuntu 20.04?