Why do echo $$, echo $(echo $$) and (echo $$) reveal the same PID?
52979
$BASHPID And $$ differ in some cases
51432
What does the "$#" special parameter mean in Bash?
39178
How to get pid given the process name
83893
How do Linux PIDS increment
18316
Security implications of forgetting to quote a variable in bash/POSIX shells
130753
Why does this echo call overwrite existing text?
110007
What is the difference between operator "=" and "==" in Bash?
135510
Why does `echo -e "\\\SOME_TEXT"` show only one backslash?
105006
What is wrong with “echo $(stuff)” or “echo `stuff`”?
41303
When do we need curly braces around shell variables?
87644
Print something in console in the same place of the previous echo, with a sort of negative echo
43973
grep - why do brackets in grep pattern remove the grep process from ps results?
132222
Why does /bin/sh behave differently to /bin/bash even if one points to the other?
25255
Finding the PID of the process using a specific port?
74254
How to distinguish between builtin and external util? (e.g. echo)
11423
Understand the meaning of `$_`
111946
How can I get the PID of the parent process of my application