Moderna bash/shell language? check out Window's Power Shell [1]. The one shell scripting language what I would use and the only of its type that its syntax don't scare me...
The syntax you quoted is doing a logical AND of two expressions. Expressions are any bit of script - including calls to executables (like the example).
It's a pity that PowerShell is Windows-only (Pash notwithstanding); its syntax is small, supports pithiness and verbosity equally well, and has an easy to understand flow once you're over the first learning hump.
[1]: http://en.wikipedia.org/wiki/Windows_PowerShell