Convenient way to check if system is using systemd or sysvinit in BASH?
107827
How to determine which init system is used?
107802
How to check if Ubuntu Desktop or Server is installed?
76437
How find out which process is using a file in Linux?
91209
How can I find the “friendly name” of the operating system from the shell / Terminal / bash?
7154
How do I identify which Linux distro is running?
34456
How can a script check if it's being run as root?
133220
How can you check which options vim was compiled with?
145543
Bash way to check if a process is already running in the background (and skip re-execution based on that)?
17649
Is there a way to check if a file is in use?
118497
How can I get a list of process IDs on the system under Linux?
98249
Is it possible to detect 32 bit vs 64 bit in a bash script?
20325
How to find information about the system/machine in Unix?
35739
Conditionally enabling systemd files through Debian packaging
60133
Is there a simple linux command that will tell me what my display manager is?
42128
Get OS-level system information
143702
What's the difference between /usr/lib/systemd/system and /etc/systemd/system?
112624
Is there an algorithm to decide if a symlink loops?