linux guru help, command diff

[etech]

Is there anyone in here who has experience with the command "diff" in linux,
I have a list with names "names.txt" and i have a list with names that should be removed from "names.txt" and it should generate an output of names.txt with the names from the remove list removed.

[etech]

anyone ???

[darksoul]

cat names.txt removes.txt|sort|uniq -u > newneatnames.txt

[etech]

cat names.txt removes.txt|sort|uniq -u > newneatnames.txt

Well this will still leave the second duplicate in the list.

[Superterrorizer]

man sort

[JaveWolf]

diff -c <filename> <filename.orig> > whatever.txt

[darksoul]

Well this will still leave the second duplicate in the list.

no it won't.

[Brujah]

no it won't.

lol, yes it will.


you want to use comm, not diff.

comm -3 names.txt remove.txt > clean.txt

Usage: comm [OPTION]... FILE1 FILE2
Compare sorted files FILE1 and FILE2 line by line.

With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and column three contains lines common to both files.

-1 suppress lines unique to FILE1
-2 suppress lines unique to FILE2
-3 suppress lines that appear in both files

[darksoul]

lol, yes it will.

lol. no it won't. God I hate ignorant people.

gw00# cat test.txt
gofuckyourself.com
brujah is a wannabe
gw00# cat test2.txt
gofuckyourself.com
gw00# cat test.txt test2.txt|sort|uniq -u
brujah is a wannabe

[Brujah]

I was wrong. Didn't know the -u option, but the comm command seemed perfect for this. Congrats, you've been a real prick about it. Always good to know who the assholes are.

[etech]

Both lists will need to be sorted when i use the comm command, right ?