What does `$` in `$'\2'` mean?
128739
What does it mean to have a $"dollarsign-prefixed string" in a script?
51432
What does the "$#" special parameter mean in Bash?
120214
What's the difference between <<, <<< and < < in bash?
154673
In the shell, what does " 2>&1 " mean?
145840
What does "3>&1 1>&2 2>&3" do in a script?
4615
What does $$ (dollar dollar or double dollar) mean in PHP?
48894
What does "\" mean in math
120372
How to typeset $:=$ correctly?
67917
what does $('') do?
13826
In Bash scripting, what's the meaning of " $! "?
133804
What does $%,.2f represent?
96454
In PHP, what does "<<<" represent?
134273
Bash: Why does this Brace Expression work this way?
96938
What's the difference between using > and >> in shell?
24686
What does `~/ ` mean?
82566
Why should I use $[ EXPR ] instead of $(( EXPR ))?
155152
What does [&] mean before function?