How to check the tasks that are running at different run levels in debian?
54476
Does systemd still know about runlevels?
95193
Find out current working directory of a running process?
144703
How to monitor CPU/memory usage of a single process?
88531
Is there a tool/website to compare package status in different Linux distributions?
84345
How can I tell if another instance of my program is already running?
110829
The "proper" way to test if a service is running in a script
60328
Is it possible to view the contents of a debian package?
138783
control panel to see running applications
68366
Checking installed packages
40402
How do I go about tracking down IO usage in Linux and other *nix OS'?
65962
How to compare a program's version in a shell script?
118655
How can I find which desktop enviroment I am using?
155682
How to check if a shell is login/interactive/batch
65188
Command line option to check which filesystem I am using?
25202
How to identify that you're running under a VM?
36547
How do I change the runlevel on systemd?
73026
How to check the process is already running or not