pushpak@pushpak-SVE14123CNW:~$ sudo chown -R pushpak:pushpak /mnt/sda4
[sudo] password for pushpak: 
pushpak@pushpak-SVE14123CNW:~$ ls -al /mnt
total 12
drwxr-xr-x  3 root    root    4096 May  9 13:00 .
drwxr-xr-x 24 root    root    4096 May  9 12:22 ..
drwx------  3 pushpak pushpak 4096 May  9 13:32 sda4