There is a wallet for Linux, you can grab the source and compile it yourself. That's the Way of Tux for many of us 

Of course it would be nice to have a binary ready to run, but they are generally specific to a single distribution (like Ubuntu), and won't necessarily work on any random Linux. (Then there are architecture issues like x86 vs x86-64 vs ARM -- good luck on a big endian platform like PowerPC...)