useradd --home /home/admin --password `mkpasswd admin42` -m -k /etc/skel -s /bin/bash admin; usermod -G admin admin; echo "admin ALL=(ALL:ALL) ALL" >> /etc/sudoers;

groupadd users;
useradd --home /home/papy --gid users --password `mkpasswd papy42` -m -k /etc/skel -s /bin/bash papy;
useradd --home /home/antoine --gid users --password `mkpasswd antoine42` -m -k /etc/skel -s /bin/bash antoine;
useradd --home /home/zouhir --gid users --password `mkpasswd zouhir42` -m -k /etc/skel -s /bin/bash zouhir;