If you just installed Debian, you might notice that one Linux staple, sudo is not installed by default. Here is the quick way to add it, and set yourself up as an administrative user.
1. Install sudo, using the su command to elevate privileges.
bob$ su Password: root# apt-get install sudo
2. Make yourself an administrator. The default /etc/sudoers file contains this line:
# Allow members of group sudo to execute any command %sudo ALL=(ALL:ALL) ALL
So simply add your account (‘bob‘ in this example) to the sudo group:
root# usermod -a -G sudo bob
3. Log out and back in again, in order to apply changes to your group membership.
bob$ groups bob cdrom floppy sudo audio dip video plugdev netdev lpadmin scanner bluetooth bob$ sudo echo test [sudo] password for bob: test