ubuntu@ubuntu:~$ sudo mount /dev/sda2 mnt-tmp
ls mnt-tmp | nc termbin.com 9999
mount: wrong fs type, bad option, bad superblock on /dev/sda2,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so

ubuntu@ubuntu:~$ ls mnt-tmp | nc termbin.com 9999
Use netcat.