DHCP, inverted commas and ssh with RSA
There is a server I manage (called alex) which has not a fixed IP. As you know, I have a shell at the best Unix server out there (by the way, it is almost free. The problem is to keep an up-to-date record of the first server's IP address. I do it as follows (and yes, I know timtowtdi).
What I did was:
Create an RSA public/private key pair at alex:
alex $ ssh-keygen -N'' -f 'id_alex' -t rsa
which creates the files id_alex and id_alex.pub.
Create a cron job for my account at alex which looks like
5,10,15,20,25,30,35,40,45,50,55,0 * * * * /usr/bin/ssh -i ...