07-13-2010
Eliminating differences in two files
Hello, I'm having trouble to read two txt files, they have employee records line by line, I need to do the reading of a file that is old and compare it with the new base in the new file, deleting the lines in old file, then add the new file data from the old file and write to the database manager.
I am new to Shell, I appreciate the help
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DIFF3(1) User Commands DIFF3(1)
NAME
diff3 - compare three files line by line
SYNOPSIS
diff3 [OPTION]... MYFILE OLDFILE YOURFILE
DESCRIPTION
Compare three files line by line.
-e --ed
Output unmerged changes from OLDFILE to YOURFILE into MYFILE.
-E --show-overlap
Output unmerged changes, bracketing conflicts.
-A --show-all
Output all changes, bracketing conflicts.
-x --overlap-only
Output overlapping changes.
-X Output overlapping changes, bracketing them.
-3 --easy-only
Output unmerged nonoverlapping changes.
-m --merge
Output merged file instead of ed script (default -A).
-L LABEL --label=LABEL
Use LABEL instead of file name.
-i Append `w' and `q' commands to ed scripts.
-a --text
Treat all files as text.
--strip-trailing-cr
Strip trailing carriage return on input.
-T --initial-tab
Make tabs line up by prepending a tab.
--diff-program=PROGRAM
Use PROGRAM to compare files.
-v --version
Output version info.
--help Output this help.
If a FILE is `-', read standard input. Exit status is 0 if successful, 1 if conflicts, 2 if trouble.
AUTHOR
Written by Randy Smith.
REPORTING BUGS
Report bugs to <bug-gnu-utils@gnu.org>.
COPYRIGHT
Copyright (C) 2007 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The full documentation for diff3 is maintained as a Texinfo manual. If the info and diff3 programs are properly installed at your site,
the command
info diff
should give you access to the complete manual.
diffutils 2.8.7-cvs January 2008 DIFF3(1)