Compare and list out only the uncommon files.

[fed.linuxgossip]

I have two files ........

root@server1 [~]# cat a.txt
john
tim
dan
peter
maria

root@server1 [~]# cat b.txt
john
tim
angel
dan
william
monica
peter
juliet
bruce
maria

Now I want to compare the two files and list out only those entries that is not present in both files say to a file named c.txt

The result should be like.
root@server1 [~]# cat c.txt
angel
william
monica
juliet
bruce



Please advice with which command/script can this be achieved.

[whitesuit]

use diff:

$ diff a.txt b.txt

then create a script to filter only the lines you want. Or man diff, it probably already does that for you with some switch.

[fed.linuxgossip]

Hi,

I found that the sdiff command does the trick.

root@server34 [~]# sdiff -s b.txt a.txt
angel <
william <
monica <
juliet <
bruce <