File operators for the test command
<<<< ^^^^^ >>>>

  •  File operators must be surrounded by whitespace.


  •  Operators with asterisks are the most commonly used.


    		•  Operator
    		 Explanation

    		FILE1 -ef FILE2
    		 FILE1 and FILE2 have the same device and inode num­bers
    *
    		 FILE1 -nt FILE2
    		 FILE1 is newer (modification date) than FILE2
    *
    		 FILE1 -ot FILE2
    		 FILE1 is older than FILE2     

    		-b FILE
    		 FILE exists and is block special

    		-c FILE
    		 FILE exists and is character special
    *
    		 -d FILE
    		 FILE exists and is a directory
    *
    		 -e FILE
    		 FILE exists

    		-f FILE FILE exists and is a regular file

    		-g FILE
    		 FILE exists and is set-group-ID

    		-G FILE
    		 FILE exists and is owned by the effective group ID

    		-k FILE
    		 FILE exists and has its sticky bit set
    *
    		 -L FILE
    		 FILE exists and is a symbolic link

    		-O FILE
    		 FILE exists and is owned by the effective user ID

    		-p FILE
    		 FILE exists and is a named pipe
    *
    		 -r FILE
    		 FILE exists and is readable
    *
    		 -s FILE
    		 FILE exists and has a size greater than zero

    		-S FILE
    		 FILE exists and is a socket

    		-t [FD] file descriptor FD (stdout by default) is opened on a terminal

    		-u FILE
    		 FILE exists and its set-user-ID bit is set
    *
    		 -w FILE
    		 FILE exists and is writable
    *
    		 -x FILE  FILE exists and is executable

    <<<< ^^^^^ >>>>

     
     
     
     
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