How to fix 'no route to host' problem

[Joe Lowder]

I still need help to solve this problem:

I recently wrote this:
> For many months, I have been using rsync to copy files
> from one of my computers to two others, and it has worked flawlessly. But
> today, it quit working and I cannot figure out why and how to correct the
> problem. Below is the error message I now see:
>
> ssh: connect to host 192.168.0.4 port 22: No route to host
> rsync: connection unexpectedly closed (0 bytes received so far) [sender]
> rsync error: unexplained error (code 255) at io.c(226) [sender=3.1.0]
>
> What do I need to do to correct this problem?

One reply said, "Can you ping it?"

Yes, I can, ping the device ip address. Also did these 2 commands:
d: arp -an
? (192.168.0.19) at c4:1c:ff:30:c5:9c [ether] on wlan0
? (192.168.0.7) at 10:0b:a9:9a:99:a8 [ether] on wlan0
? (192.168.0.1) at 52:b9:e5:c9:b9:cc [ether] on wlan0
d: ip neighbor
192.168.0.19 dev wlan0 lladdr c4:1c:ff:30:c5:9c REACHABLE
192.168.0.7 dev wlan0 lladdr 10:0b:a9:9a:99:a8 STALE
192.168.0.1 dev wlan0 lladdr 52:b9:e5:c9:b9:cc DELAY

But I don't know what to do with the results.

Another reply suggested:
> So: Go to the target machine and find out what its
> IP and MAC are--"/sbin/ifconfig" from the command line
> will show that info. Then set up your router such that
> it will always give out 192.168.0.4 to that MAC.

But I don't know how to set my router so that it will
always give out 192.168.0.4 to that MAC.