We have a bunch of files in a directory that we'd like to concatenate into a single file. I've seen the question asked on Stack Overflow but the answers are not satifactory. It appears that there is a concat method on the FileSystem class in HDFS, but I don't see this method exposed in the HDFS shell. Why is this method not exposed to the HDFS shell? Is there an easy way to accomplish this task that we're missing?