[SOLVED] bash: sudo: command not found on debian jessie

Issue

newly I installed debian 8 on my laptop and when I tried to use "sudo" it replied

bash: sudo: command not found

when I used

/usr/bin/sudo

it replied

bash: /usr/bin/sudo: No such file or directory

and after that when I tried to install it with 'apt-get' I got this

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  sudo
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/850 kB of archives.
After this operation, 2,694 kB of additional disk space will be used.
Media change: please insert the disc labeled
 'Debian GNU/Linux 8.0.0 _Jessie_ - Official amd64 CD Binary-1 20150425-12:54'
in the drive '/media/cdrom/' and press enter

I installed it with usb flash memory and I don't have cd image what should I do?

Solution

I found it! source.list in /etc/apt/source.list was empty! for someone that has a same problem: go to the bellow link and find your country and copy links to source.list or search debian source list generator debian.org/mirror/list-full

Answered By - Arash Kadkhodaei