Thursday, October 20, 2016

How-To flush the DHCP server lease cache


Check your /var/lib/dhcpd/dhcpd.leases file and check for the entry. It contains the list of all dhcp leases.

Step 1:- Stop dhcp server
service dhcpd stop

Step 2:- delete the temporary file dhcpd.leases~:
rm dhcpd.leases~

Step 3:- flush the lease cache dhcpd.leases:
echo "" > dhcpd.leases

Step4:- Start DHCP Server
service dhcpd start

the next time the clients will request a lease they will probably obtain a different IP respect the one they had before.