How to verify whether I have updated from beta to stable?
71697
Am I using beta or stable?
29362
How do I install a single package from Debian testing or unstable on stable?
1520
How to install software or upgrade from an old unsupported release?
111810
How do I check the checksum of a download and why should I?
106595
Check Software Version
154555
What is the correct core update workflow?
40753
How can I run Debian stable but install some packages from testing?
64558
What does `do-release-upgrade` really do?
93880
How do I check system specifications?
124855
How can I check /dev/xvda1?
14777
How to check if a specific Windows security update is installed?
122672
How to verify iOS app integrity?
151411
How can I know if a virtual package is "installed" on a Debian system?
68366
Checking installed packages
18514
Where can I find the status of the released versions of Ubuntu?
86921
How do I check if a package is installed on my server?
91598
How do I see the most recent updates installed in Windows 8.1 in "installed updates"?