What's the difference between [ and [[ in Bash?
118280
Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
22609
What is the difference between "source x", ". x" and "./x" in Bash?
13826
In Bash scripting, what's the meaning of " $! "?
153555
Why does bash "echo [t]" result in "t" not "[t]"
977
What is the difference between [@] and [*] when referencing bash array values?
73300
How do `>` and `>>` work?
106701
Bash: What does ">|" do?
105563
Posix Character Sets difference between [[:blank:]] and [[:space:]]?
128374
what is $$ in bash?
132443
number of tokens in bash variable
111133
Difference between 'ls' and 'echo $(ls)'
93909
How to split a string into an array in Bash?
21131
bash nested case syntax and ;; terminators
153897
bash: syntax error near unexpected token `('
133281
Unix find command, what are the {} and \; for?
61676
Syntax of bash alias definition
64104
What does `[ EXPRESSION ], [ ] and [OPTION` mean in `man test`?