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plan9-grep.1
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egrep(1)
fgrep(1)
grep(1)
rgrep(1)
grep(1posix)
-E %27%28%5EINT%7C%5EEXT%29%27 Script.txt %7C nl %7C sed -E -e %27s%2F%28%5B0-9%5D%2B%29.%2F%5C1%2C%2F%27 -e %27s%2F%28INT%7CEXT%29.%7B0%2C2%7D%2F%5C1%2C%2F%27 %3E SceneList.csv
search a file for a pattern
source manpages:
plan9-grep