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Top Forums Shell Programming and Scripting Compare two files and lines which are the same just delete it Post 303003036 by tomislav91 on Thursday 7th of September 2017 03:08:31 AM
Old 09-07-2017
Compare two files and lines which are the same just delete it

I am having a two files and different days, and this is example:
file1: 06.09.2017.
Code:
abcd
123

file2: 07.09.2017.
Code:
abcd
1234

So what I want is that file2 with today's date contains only 1234, so where is a problem you would ask?
Problem is here that I put these commands into routers,. and error occurred with message that interface already exist, and no other commands are pasted into router.
Solution that I think is to compare two files, one yesterday and one for today, and compare it, if lines are the same DELETE IT FROM TODAY and leave only what is different.

Last edited by rbatte1; 09-07-2017 at 04:56 AM.. Reason: Added CODE tags, corrected spelling etc.
 

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XZDIFF(1)							     XZ Utils								 XZDIFF(1)

NAME
xzcmp, xzdiff, lzcmp, lzdiff - compare compressed files SYNOPSIS
xzcmp [cmp_options] file1 [file2] xzdiff [diff_options] file1 [file2] lzcmp [cmp_options] file1 [file2] lzdiff [diff_options] file1 [file2] DESCRIPTION
xzcmp and xzdiff invoke cmp(1) or diff(1) on files compressed with xz(1), lzma(1), gzip(1), bzip2(1), or lzop(1). All options specified are passed directly to cmp(1) or diff(1). If only one file is specified, then the files compared are file1 (which must have a suffix of a supported compression format) and file1 from which the compression format suffix has been stripped. If two files are specified, then they are uncompressed if necessary and fed to cmp(1) or diff(1). The exit status from cmp(1) or diff(1) is preserved. The names lzcmp and lzdiff are provided for backward compatibility with LZMA Utils. SEE ALSO
cmp(1), diff(1), xz(1), gzip(1), bzip2(1), lzop(1), zdiff(1) BUGS
Messages from the cmp(1) or diff(1) programs refer to temporary filenames instead of those specified. Tukaani 2011-03-19 XZDIFF(1)
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