-b filename - Block special file -c filename - Special character file -d directoryname - Check for directory Existence -e filename - Check for file existence, regardless of type (node, directory, socket, etc.) -f filename - Check for regular file existence not a directory -G filename - Check if file exists and is owned by effective group ID -G filename set-group-id - True if file exists and is set-group-id -k filename - Sticky bit -L filename - Symbolic link -O filename - True if file exists and is owned by the effective user id -r filename - Check if file is a readable -S filename - Check if file is socket -s filename - Check if file is nonzero size -u filename - Check if file set-user-id bit is set -w filename - Check if file is writable -x filename - Check if file is executable