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This article mainly shows you "how to use AWK to achieve the comparison of two files", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to use AWK to achieve the comparison of two files" this article.

Two files, test11.txt and test22.txt match, print out the content that matches the successful test22.txt

Root@ubuntu:/tmp# cat test11.txt aabbcc2daxdrraaffroot@ubuntu:/tmp# cat test22.txt aa 12132efea 90ifd abb 44cc 1232 432d 432a fdaxd 32rr feaa r32ff 22fdsail 00hell 001

Awk processing:

Root@ubuntu:/tmp# awk 'NR==FNR {a [$1] = 1} NR > FNR {if ($1 in a) print $0}' test11.txt test22.txt > result.txt root@ubuntu:/tmp# cat result.txt aa 12132bb 44cc 1232 432d 432a fdaxd 32rr feaa r32ff 22

Comments: the lines of the current NR file, the number of records read by FNR. NR=FNR when reading the first file

When the second file is read, FNR continues to count based on the first file. NR zeroing and re-recording.

When NR==FNR, process the first file

When NR > FNR, process the second file

Count the number of entries per minute in the log:

Cat access.log | awk-F ":"'{+ + S [$3]} END {for (i in S) print I "\ t" S [I]}'| sort-k1g

Minutes of time in $3-bit logging.

The-k 1g g parameter is similar to n, sorted by number

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