Shell Programming and Scripting

Hi Guys,

I'm a complete shell scripting newbie and need some help with comparing a file against a master file and outputting the results.

master.txt would look something like this:

Code:

000123
000345
000341
000927
000762
000235
000155
000452
000846
000623

file.txt would look like this:

Code:

000452
000341
000927

I need to compare file.txt against master.txt and output two files:

One file would be the numbers which are in both master.txt and file.txt
eg. same.txt

Code:

000452
000341
000927

And the other file would be the numbers which are in master.txt, but not in file.txt
eg. notsame.txt

Code:

000123
000345
000762
000235
000155
000846
000623

Any help would be greatly appreciated!

Assuming that neither file is too large to pose an issue for sort or /tmp:

Code:

sort master.txt >/tmp/JNK$$.master
sort file.txt >/tmp/JNK$$.file
comm -12 /tmp/JNK$$.master /tmp/JNK$$.file >/tmp/in_both
comm -23 /tmp/JNK$$.master /tmp/JNK$$.file >/tmp/just_master
rm /tmp/JNK$$.*

Check the manual page for comm for description of the options; I've been using comm for years and have to read the man page nearly every time I need to use it.