This question is related to How to make my ethernet network printer visible to other laptops?Part of the solution to that post is running ip ro add 192.168.2.5/32 dev eth0Now I have a new problem - the effect of this command disappears after some time, as if something refreshes the relevant settings.Please, observe:ethan@ethan ~ $ sudo -i[sudo] password for ethan: ethan ~ # ip ro add 192.168.2.5/32 dev eth0ethan ~ # logoutethan@ethan ~ $ ip rodefault via 192.168.2.1 dev wlan0  proto static 192.168.0.0/16 dev eth0  proto kernel  scope link  src 192.168.2.4  metric 1 192.168.2.0/24 dev wlan0  proto kernel  scope link  src 192.168.2.166  metric 9 192.168.2.5 dev eth0  scope link ethan@ethan ~ $ ping 192.168.2.5PING 192.168.2.5 (192.168.2.5) 56(84) bytes of data.64 bytes from 192.168.2.5: icmp_seq=1 ttl=255 time=1.13 ms64 bytes from 192.168.2.5: icmp_seq=2 ttl=255 time=0.585 ms64 bytes from 192.168.2.5: icmp_seq=3 ttl=255 time=1.14 ms^C--- 192.168.2.5 ping statistics ---3 packets transmitted, 3 received, 0% packet loss, time 2000msrtt min/avg/max/mdev = 0.585/0.954/1.142/0.260 msethan@ethan ~ $ ip rodefault via 192.168.2.1 dev wlan0  proto static 192.168.0.0/16 dev eth0  proto kernel  scope link  src 192.168.2.4  metric 1 192.168.2.0/24 dev wlan0  proto kernel  scope link  src 192.168.2.166  metric 9 ethan@ethan ~ $ As you can see from the transcript I first run ip ro add 192.168.2.5/32 dev eth0 and that adds the line 192.168.2.5 dev eth0  scope link to the output of ip ro. A day passes and I run ip ro again. Oops, one no longer sees 192.168.2.5 dev eth0  scope link on the output and hence I need to run the ip ro add ... command again.What is gong on? How can I make the routing changes permanent? Please, note that the output is taken from the same shell window - I did not log out in the middle. Could be that the notebook went to sleep, though, at some point.P.S.I do not understand much in network setup. Here is the contents of my interfaces file:$ cat /etc/network/interfaces# interfaces(5) file used by ifup(8) and ifdown(8)auto loiface lo inet loopback
Making routing table changes permanent
linux;routing