ssh: option requires an argument -- l
Usage: ssh [options] host [command]
Options:
 -l user   Log in using this user name.
 -n     Redirect input from /dev/null.
 -F config  Config file (default: ~/.ssh/config).
 -A     Enable authentication agent forwarding.
 -a     Disable authentication agent forwarding (default).
 -X     Enable X11 connection forwarding.
 -x     Disable X11 connection forwarding (default).
 -i file   Identity for public key authentication (default: ~/.ssh/identity)
 -t     Tty; allocate a tty even if command is given.
 -T     Do not allocate a tty.
 -v     Verbose; display verbose debugging messages.
       Multiple -v increases verbosity.
 -V     Display version number only.
 -q     Quiet; don't display any warning messages.
 -f     Fork into background after authentication.
 -e char   Set escape character; ``none'' = disable (default: ~).
 -c cipher  Select encryption algorithm
 -m macs   Specify MAC algorithms for protocol version 2.
 -p port   Connect to this port. Server must be on the same port.
 -L listen-port:host:port  Forward local port to remote address
 -R listen-port:host:port  Forward remote port to local address
       These cause ssh to listen for connections on a port, and
       forward them to the other side by connecting to host:port.
 -D port   Enable dynamic application-level port forwarding.
 -C     Enable compression.
 -N     Do not execute a shell or command.
 -g     Allow remote hosts to connect to forwarded ports.
 -1     Force protocol version 1.
 -2     Force protocol version 2.
 -4     Use IPv4 only.
 -6     Use IPv6 only.
 -o 'option' Process the option as if it was read from a configuration file.
 -s     Invoke command (mandatory) as SSH2 subsystem.
 -b addr   Local IP address.