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cat.1posix
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cat(1)
plan9-cat(1)
plan9-read(1)
read(1posix)
failedcomments.log %7C sed -e %27s%2F%5E.*mistake%5C%3A %2F%2F%27 %7C grep -iv %27%5C%5B%27 %7C sort %7C uniq -c %7C sort -nr
concatenate and print files
source manpages:
cat