Retrieve CenturyLink PPPoE username/password from technicolor C2000T

PPPoE-info.sh

# first enable telnet, and connect
# then you will get a '>' prompt where you want to run the following commands
sh
pidstat -l -C pppd
# see -u (username) and -p (password) in the output

The zyxel c2100z also has sh password protected.

This is great! I used it on a c2100t and it worked just like I was hoping. Note: When I went to the router settings to turn on telnet, it asked for a username and password, this is what I used in the telnet login.

Still works great on the C2100T. Glad I found this, as calling CenturlyLink's customer support for any reason at all is an exercise in futility.
ONE NOTE: if you've changed the login username/password for the admin web login on the router, you'll still have to use the origninal logon/password from the modem's CenturyLink label to telnet in, apparently changing the admin login/pass only affects the web logon credentials.

I've got a C2000A. sh is password protected, but I do have access to ps and cat. I used ps to find the PID of pppd (and partial command line) then did cat /proc/$PID/cmdline to get the user/pass.