SSH (secure shell) and user account

root@pankaj-HP-Pro-3330-MT:/home/pankaj# dpkg -l|grep sudo

ii  gnome-sudoku                               1:3.28.0-1                          amd64        Sudoku puzzle game for GNOME
ii  sudo                                       1.8.21p2-3ubuntu1                   amd64        Provide limited super user privileges to specific users


root@pankaj-HP-Pro-3330-MT:/home/pankaj# dpkg -L sudo
/.
/etc
/etc/pam.d
/etc/pam.d/sudo
/etc/sudoers
/etc/sudoers.d
/etc/sudoers.d/README
/lib
/lib/systemd
/lib/systemd/system

for Removing the password use:-

 Cmmd----sudo visudo

\\enter at last 

%pankaj ALL=(ALL) NOPASSWD: /usr/bin/slabtop .