What does `echo $?` mean in bash?
6462
Meaning of $? (dollar question mark) in shell scripts
75605
What does ~$ stand for?
75274
Special variables in bash
8641
Which are the (Bash) shell special parameters/variables?
21577
What does $ mean/do in Haskell?
909
What is this shell/Bash syntax: someVariable=someValue someCommand
146357
Can I echo a variable with single quotes?
76281
What does $(command) & do?
24077
What the #$@&%*! is that called?
75093
What does ? in C mean?
74845
Difference between single and double quotes in Bash
114373
Echoing a string in bash with brackets surrounding it returns 'b'
34893
Is there a difference between the '&&' and ';' symbols in a standard BASH terminal?
125882
Could someone please explain this bash command?
35122
What's the meaning of a dot before a command in shell?
57226
What is the syntax for IF/ELSE in bash?
154604
Why is there a /bin/echo and why would I want to use it?