OPERATOR DESCRIPTION
-A Age of file in days from the last access time.
-B if the file is a binary file.
-C Age of file in days from the last inode change.
-M Age of file in days when script started.
-O if the file is owned by the real user ID (UID).
-R if the file is readable by real UID or group ID (GID).
-S if the file is a socket.
-T if the file is a text file.
-W if the file is writable by real UID or GID.
-X if the file is executable by real UID or GID.
-b if the file is a block special file.
-c if the file is a character special file.
-d if the file is a directory.
-e if the file exists.
-f if the file is a plain file.
-g if the file has setgid bit set.
-k if the file has sticky bit set.
-l if the file is a symbolic link.
-o if the file is owned by effective UID.
-p if the file is a named pipe.
-r if the file is readable by effective UID or GID.
-s if the file has nonzero size and returns the size of the file.
-t if the filehandle is opened to a TTY.
-u if the file has setuid bit set.
-w if the file is writable by effective UID or GID.
-x if the file is executable by effective UID or GID.
-z if the file has zero size.
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