md5suming a file is fine, but I cannot seem to invoke
md5sum to calculate the hash based only on the file's contents. (For those wondering, I'd prefer that multiple
wgets of the same file return the same md5 hash.
md5summing the file keeps reporting different hashes because the timestamp on the file is different.)
julian@julian-computer:/tmp$ md5sum < `cat index.html` bash: `cat index.html`: ambiguous redirect