how to check the defintion of a particular environment?
42029
Where do I find out how a command/environment is defined?
128779
How do I get the list of exit codes (and/or return codes) and meaning for a command/utility?
30828
How can I tell which package an executable came from?
77247
How to audit one specific list/library?
13602
Nested amsmath environments with \newenvironment
83704
How can I know what OS I'm working in?
96317
How to check type of variable in Java?
133220
How can you check which options vim was compiled with?
151487
Determine if inside \lstinline or ordinary lstlisting environment
8014
How to determine the architecture of an installation or Live CD/DVD?
18700
How is the C library able to access environment variables?
113563
How to go about determing the System Type of my setup?
4684
What's the canonical way to check for type in Python?
42309
Using an environ environment with \newenvironment
102826
Easy way to check that a variable is defined in python?
93880
How do I check system specifications?
80657
How can I check through command-line the computer form(Desktop, notebook or All-in-one)?