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gmane.editors.sed.user |
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<[email protected]> |
If you must do it with "sed" then you could take the following route:
Assuming that all lines in both files have the same format, i.e., the IP numberwe will place an empty line at the end of File2. Then read in the whole of File2first into the hold area. Then after the File2 has been fully read in (signaled by thereading in of the dummy empty line we ourselves placed at File2 end) we shall compare the incoming lines in the pattern space (File1) with the ones in the hold to determine whetherit needs to be retained/discarded.
The above gets translated as below (untested..) You must test it for syntax/corner cases....
sed -ne '# read in the whole of File2 first into the hold area/./!bfile1H;1h;d
# now read in the File1:file1n;G# PS => ip\nip1\nip2\n...\nipzy/\n_/_\n//^\([_]*\).*_\1_/d/^\([_]*\).*_\1$/dy/\n_/_\n/P;bfile1' File2 File1
HTH
-Rakesh
To: [email protected]
From: [email protected]
Date: Mon, 3 Nov 2014 04:58:07 -0800
Subject: Using one file to edit a second file.
Im sitting in class right now .. so I cant provide an example.
But .. I have two files.
FIle1
10.10.10.2
10.10.10.4
10.10.10.6
10.10.10.8
10.10.10.10
File2
10.10.10.1
10.10.10.2
10.10.10.3
10.10.10.4
10.10.10.5
10.10.10.6
10.10.10.7
10.10.10.8
10.10.10.9
10.10.10.10
I want to use file one to search file two. If ips in file one are matched in file2, I want to delete them and write a file of non matched ips
10.10.10.1
10.10.10.3
10.10.10.5
10.10.10.7
10.10.10.9
ofcourse there are special considerations 10.10.10.1, 10.10.10.10, 10.10.10.100 .. need exact matches.
I could do with is if or case statements .. but just wondering if sed can do it.
THanks for the help.
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