Get IP address from CLI
CURL
curl ip.hexide.com
DIG
dig -4 TXT +short o-o.myaddr.l.google.com @ns1.google.com
dig -6 TXT +short o-o.myaddr.l.google.com @ns1.google.com
Linux
Don't break your Debian - Unstable repositories
If you have been using Debian for a longer period of time, likely you have added unstable repositories to your apt at some point. Later with a system update/upgrade you might have