Re^2: search text file

To count all the matches from the command line:

grep -oF -f firstfile secondfile | sort | uniq -c
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Re^3: search text file by ambrus (Abbot) on Jul 27, 2011 at 11:51 UTC
Ah, good idea using `grep -o`. That does indeed find multiple matches in a single line. That, however, won't work correctly if some of the matches are overlapping. Eg. if the second file has `abcdef` and the first file has the two strings `abcd` and `cdef`, grep will only find the `abde` part. As a workaround, you could run grep once for each string in the first file. Thus, we get (I think) `( while read; do grep -oFe "$REPLY" secondfile \| wc -l; done ) < first +file` [download]	[reply] [d/l] [select]

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Re^3: search text file
by ambrus (Abbot) on Jul 27, 2011 at 11:51 UTC

Ah, good idea using grep -o. That does indeed find multiple matches in a single line.

That, however, won't work correctly if some of the matches are overlapping. Eg. if the second file has abcdef and the first file has the two strings abcd and cdef, grep will only find the abde part. As a workaround, you could run grep once for each string in the first file. Thus, we get (I think)

( while read; do grep -oFe "$REPLY" secondfile | wc -l; done ) < first
+file
[download]

[reply]
[d/l]
[select]