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# rename some files based on some counter

x=0  # set an environment variable for our counter
for i in foo/*  # for every file in the foo directory
do
    # we're going to rename the file, and prefix it with the value in the
    # counter. the variable $i will contain both the directory foo, as well as
    # the filename (e.g., foo/bar). Since we want to prefix the number on to
    # the filename, we need to somehow strip out the foo/ part. we can do this
    # using a program called basename (it's worth a peak at its man page).

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