Pastebin

[[ -
condition code
-b      -- block special file
-c      -- character special file
-d      -- directory
-e  -a  -- existing file
-f      -- regular file
-g      -- setgid bit
-G      -- group-owned file
-k      -- sticky bit
-L  -h  -- symbolic link
-n      -- non-empty string
-N      -- unread file
-o      -- option
-O      -- own file
-p      -- named pipe
-r      -- readable file
-s      -- non-empty file
-S      -- socket
-t      -- terminal file descriptor
-u      -- setuid bit
-w      -- writable file
-x      -- executable file
-z      -- empty string
parameter
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