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Full Discussion: compare two files
Top Forums Shell Programming and Scripting compare two files Post 302349894 by drl on Wednesday 2nd of September 2009 07:19:58 AM
Old 09-02-2009
Hi.
Quote:
DESCRIPTION
combine combines the lines in two files. Depending on the boolean
operation specified, the contents will be combined in different ways:

and Outputs lines that are in file1 if they are also present in file2.

not Outputs lines that are in file1 but not in file2.

or Outputs lines that are in file1 or file2.

xor Outputs lines that are in either file1 or file2, but not in both
files.

"-" can be specified for either file to read stdin for that file.

The input files need not be sorted ...

-- excerpt from man combine in Debian GNU/Linux 5
This is a useful utility compared to comm because there is no requirement for sorting.

The elimination of lines ending in full-stop may be done after the combine or as a preliminary step, say with a sed command like:
Code:
sed '/\.$/d'

cheers, drl
 

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dos2unix(1)						      General Commands Manual						       dos2unix(1)

NAME
dos2unix - DOS/MAC to UNIX text file format converter SYNOPSYS
dos2unix [options] [-c convmode] [-o file ...] [-n infile outfile ...] Options: [-hkqV] [--help] [--keepdate] [--quiet] [--version] DESCRIPTION
This manual page documents dos2unix, the program that converts plain text files in DOS/MAC format to UNIX format. OPTIONS
The following options are available: -h --help Print online help. -k --keepdate Keep the date stamp of output file same as input file. -q --quiet Quiet mode. Suppress all warning and messages. -V --version Prints version information. -c --convmode convmode Sets conversion mode. Simulates dos2unix under SunOS. -o --oldfile file ... Old file mode. Convert the file and write output to it. The program default to run in this mode. Wildcard names may be used. -n --newfile infile outfile ... New file mode. Convert the infile and write output to outfile. File names must be given in pairs and wildcard names should NOT be used or you WILL lost your files. EXAMPLES
Get input from stdin and write output to stdout. dos2unix Convert and replace a.txt. Convert and replace b.txt. dos2unix a.txt b.txt dos2unix -o a.txt b.txt Convert and replace a.txt in ASCII conversion mode. Convert and replace b.txt in ISO conversion mode. Convert c.txt from Mac to Unix ascii format. dos2unix a.txt -c iso b.txt dos2unix -c ascii a.txt -c iso b.txt dos2unix -c mac a.txt b.txt Convert and replace a.txt while keeping original date stamp. dos2unix -k a.txt dos2unix -k -o a.txt Convert a.txt and write to e.txt. dos2unix -n a.txt e.txt Convert a.txt and write to e.txt, keep date stamp of e.txt same as a.txt. dos2unix -k -n a.txt e.txt Convert and replace a.txt. Convert b.txt and write to e.txt. dos2unix a.txt -n b.txt e.txt dos2unix -o a.txt -n b.txt e.txt Convert c.txt and write to e.txt. Convert and replace a.txt. Convert and replace b.txt. Convert d.txt and write to f.txt. dos2unix -n c.txt e.txt -o a.txt b.txt -n d.txt f.txt DIAGNOSTICS
BUGS
The program does not work properly under MSDOS in stdio processing mode. If you know why is that so, please tell me. AUTHORS
Benjamin Lin - <blin@socs.uts.edu.au> Bernd Johannes Wuebben (mac2unix mode) <wuebben@kde.org> MISCELLANY
Tested environment: Linux 1.2.0 with GNU C 2.5.8 SunOS 4.1.3 with GNU C 2.6.3 MS-DOS 6.20 with Borland C++ 4.02 Suggestions and bug reports are welcome. SEE ALSO
unix2dos(1) mac2unix(1) 1995.03.31 dos2unix v3.0 dos2unix(1)
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