Can't use command line, need help

[jbander]

* is not in the sudoers file. The * is my name, I've followed directions to fix this for linux in general and Ubuntu but It still comes up and I can't do anything in the command line. Can't get into the subdoers.d file, you have to be root and I can't do that. I'm lost at this point. Can anyonehelp me out. Thank you. I'm in Debian 8.8.0

[bryanmc]

Assuming the terminal is functional, but you just can't use sudo...
open a terminal
su <enter> enter root password <enter>
usermod -aG sudo username <enter>
exit the terminal, then log out and log back in

[Lysander]

Gott im Himmel, could you not work this out for yourself. Is this your system?

bryanmc is on the money. Read this too:

https://wiki.debian.org/sudo

[Head_on_a_Stick]

Can't get into the subdoers.d file, you have to be root and I can't do that.

Use the init=/bin/bash kernel command line parameter to boot to a passwordless root shell then remount the root filesystem rw and add your user to the "sudo" group then reboot.

[sunrat]

you have to be root and I can't do that.

Ummm, you probably can. sudo is not necessary to use in a Debian system. Try typing su in a terminal and enter your root password.
If you feel you must use sudo, follow advice above to enable it. sudo is not configured by default unless you specifically do it during installation.