hello,You need to sort the files first...see below for difference in comm behavior...
I have been trying to write a shell script that will compare 2 files and generate a 3rd.
i have a list of abusive IP's generated by our router. I want to compare it against a list of known abuse IPs ..and have it create a file of repeat offenders.
ive tired to use "comm" to compare file1 against file2 doing something like
comm -12i file1 file2 >file3
however it doesnt seem to work....any suggestions ?
thank you for all your help in advance
Script started on Tue Dec 16 20:27:59 2003 freeb# cat blacklist1 192.168.1.2 192.168.1.1 192.168.1.10 freeb# cat blacklist2 192.168.1.1 192.168.1.10 freeb# comm -i12 blacklist1 blacklist2 freeb# sort blacklist1 > blacklist1_sorted freeb# sort blacklist2 > blacklist2_sorted freeb# comm -i12 blacklist1_sorted blacklist2_sorted 192.168.1.1 192.168.1.10
Script done on Tue Dec 16 20:29:14 2003
Scott
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