On boot you see many copies of /etc/network/if-up.d/ntpdate lockfile-create /var/lock/ntpdate This is because of the ntpdate script, which runs for every interface. To prevent this, add this to the top of /etc/network/if-up.d/ntpdate: # Only update the date if eth0 goes up. if [ "$IFACE" != eth0 ]; then exit 0 fi