Why “which” returns none on some commands I can run?
73626
Why wouldn't the `which` command work for `cd`? I can't find the executable for `cd` either!
43307
How can I run a different command but with the same arguments?
83392
Why is "if not someobj:" better than "if someobj == None:" in Python?
75231
Why does this variable have no value even though it is set in .bashrc?
103196
How to find list of available shells by command-line?
106972
tell if last command was empty in PROMPT_COMMAND
58290
Why can I not access a file named `-` when quoting?
7885
Linux/bash does not execute the executable that "which" tells me
68586
Linux commands shows different results
53709
find command: -or option doesn't work
45087
Python idiom to return first item or None
128045
Why does this script print an extraneous 'none' in the output
24846
How can I find which command is bound to a given keyboard shortcut?
9362
cmd has wildcard bug?
74744
Different command definitions with and without optional argument
102498
Commands not working
97019
Linux command "which" doesn't locate executable files on NFS path under Ubuntu