i installed a new Debian on a small VPS and now when i try to install sudo i just get this message. I also tried to add FTP-Server into the list and i still get that error.

root@srv45758:~# vi /etc/apt/sources.list
deb http://ftp.de.debian.org/debian/ jessie main contrib non-free
deb http://ftp.de.debian.org/debian/ main contrib non-free
deb http://security.debian.org jessie/updates main contrib non-free

Does any one maybe know the problem?

3 Answers 3


Verify your sources here

Try using apt-get install sudo to get it.

You can configure users to use it with its config file:

vi /etc/sudoers

add a line:

user ALL=(ALL) ALL
  • I was trying to install it with apt-get install sudo
    – Janlasse
    Mar 10, 2017 at 15:32
  • 11
    @Janlasse Try running apt-get update first to synchronize package lists.
    – Marek Rost
    Mar 10, 2017 at 15:41
  • @MarekRost Thanks this works for me. After updating I'm able to install sudo. Apr 26, 2019 at 16:23
apt-get update
apt-get install sudo
  • 1
    Code without any explanation is useless. Can you elaborate on this a little more?
    – Toto
    Jan 13 at 22:15
  • these commands are self-explanatory, you may google and post a question on which part is not clear.
    – Vishrant
    Jan 13 at 22:54

add to /etc/apt/sources.list

deb http://deb.debian.org/debian stretch main
deb-src http://deb.debian.org/debian stretch main

and run su && apt-get update. now open new shell and itll be available

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