How can I trust what I am installing? (apt,snap,etc)
38595
Are Ubuntu packages security audited?
153810
"Untrusted packages could compromise your system's security" appears while trying to install anything
125829
If I follow instructions from a blog or Ask Ubuntu, etc, is it always safe?
16502
How can I know the dependencies of a certain package?
34950
Why do snap-packages exist - is there a real need?
111810
How do I check the checksum of a download and why should I?
89366
Which package version am I using?
144022
How to install a package from a local repository?
135452
How do you see what packages are available for update
130358
How to build all my installed package from sources?
73749
How to find manually installed packages?
12748
Ubuntu fails to complete package install using Snap
46618
How can I know what programs some apt-get package contains?
40753
How can I run Debian stable but install some packages from testing?
69275
I installed a program by getting its source code, and then running `sudo make install`; how to make `apt-get` know about it?
130228
How do I mark a .desktop file as trusted in Ubuntu 18.04?
127852
How do I update a program installed from a manually-downloaded deb package?