-c Is the file character special? -d Is (Web host forum)
-c Is the file character special? -d Is the file a directory? -e Does the file exist? -f Is the file a regular file? -g Does the file have the set-group-ID bit set? -k Does the file have the sticky bit set? -L Is the file a symbolic link? -p Is the file a named pipe? -r Is the file readable by the current user? -s Is the file nonempty? -S Is the file a socket? -t [file-descriptor] Is the file associated with file-descriptor (or 1, standard output, by default) connected to a terminal? -u Does the file have the set-user-ID bit set? -w Is the file writable by the current user? -x Is the file executable? -O