I just had this happening on an Ubuntu Edgy server running in a virtual machine, what a pain to get fixed. :) I finally found out that I had to open my virtual machine program, login to a seperate tty and sudo from there, as no ssh connection allowed me to do this.
It was the same as above, and neither sudo -v, sudo -K or sudo -k allowed me to enter a password. This often happens just after reinstall of a system, too. -- "sudo -k" fails when timestamp is in the future https://launchpad.net/bugs/43233 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
