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Full Discussion: Simple awk command to compare two files and print first difference
Top Forums Shell Programming and Scripting Simple awk command to compare two files and print first difference Post 302996492 by RudiC on Wednesday 26th of April 2017 06:03:57 PM
Old 04-26-2017
How about
Code:
diff -y -b --suppress-common-lines file1 file2 | cut -f1 | head -1
123476854


Or, slightly adapting your own awk proposal:
Code:
awk ' NR==FNR { a[$0]; next } !($0 in a){ print $1; exit } ' file2 file1
123476854

This User Gave Thanks to RudiC For This Post:
LMHmedchem
 

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LEARN ABOUT DEBIAN

xzdiff

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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