On: SSH Examples, Tips and Tunnels

[h1d]

What chance is there that grep doesn't exist on a machine that has ssh and cat?

Having some undesired grep version could be one reason but not enough to justify piping everything before grep in the example.

[yjftsjthsd-h → h1d]

There are systems with SSH that are not Unix. For instance, Cisco switches support SSH but don't have a grep. (They do have an equivalent, but it's unfamiliar and likely less feature-rich)