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#1
March 6th, 2006, 09:27 AM
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Diff command
Hi,
I am having two files. Data in both the files are as File 1 : BCSU-1 0032 WO-EX - BCSU-2 0034 SP-EX - BCSU-3 0045 WO-EX - BCSU-4 0046 WO-EX - File 2: BCSU-1 0032 SP-EX - BCSU-3 0045 WO-EX - I need a command which will compare these two files and give me an output as, BCSU-2 0034 SP-EX - BCSU-4 0046 WO-EX - In short, the output file should not contain those lines where common first word exists. I tried using diff command, but it compares the whole line instead of comparing only the first word. Please let me know how to tackle this problem. BR Nevil
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#2
March 6th, 2006, 01:46 PM
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Not sure what kind of shell you're using. With bash or ksh, this works fine:
Code:
for i in `awk '{print $1}' file1`
do
if ! grep $i file2 >/dev/null 2>&1
then
grep $i file1
fi
if ! grep $i file1 >/dev/null 2>&1
then
grep $i file2
fi
done
If either file has more than one line that starts with "BCSU-2" (as an example) then this hack might not work properly.
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