/sbin/pppoe
/sbin/pppoe-connect
/sbin/pppoe-relay
/sbin/pppoe-server
/sbin/pppoe-setup
/sbin/pppoe-sniff
/sbin/pppoe-start
/sbin/pppoe-status
/sbin/pppoe-stop
/usr/sbin/adsl-setup
/usr/sbin/adsl-start
/usr/sbin/adsl-stop
/usr/sbin/pppoe
/usr/sbin/pppoe-connect
/usr/sbin/pppoe-relay
/usr/sbin/pppoe-server
/usr/sbin/pppoe-setup
/usr/sbin/pppoe-sniff
/usr/sbin/pppoe-start
/usr/sbin/pppoe-status
/usr/sbin/pppoe-stop
You may install this package on CentOS with
yum
install rp-pppoe