Having ssh access to my home machine is a tool I rely on regularly. Sometimes
I need a file. Sometimes I want to grep some files. Sometimes I want to start
a big download of something so it's ready when I get home.
The problem with most home Internet access plans is that you have a dynamic
IP address. There are services (such as no-ip) which
allow you to not only get around this, but also have a real URL you can use
to access your home machine.
But if you want to keep things simple, here's a quick solution. Just have a
script run on your home machine regularly which gets the IP and puts it
In this example, I use a free service, jsonip, to get
my external IP address, and Dropbox, which will sync the output to my work
computer. You can also easily have the file transferred somewhere with scp,
Here's the code:
wget http://jsonip.com/ -O /home/shawn/Dropbox/info/home_ip.txt
Since I use Dropbox on all my computers, I can always get my home IP if it
Just schedule it to run via cron every so often, depending on how
frequently your ISP changes your IP. Here's an example to run
it every six hours:
0 */4 * * * /home/shawn/bin/get_home_ip.sh
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