Remove Multiple Strings From a File

[primowalker1960]

I have a list of 8000 servers, one server per line, in a text file. I need to remove 2000 specific server names from this file and save the remaining 6000 server names in another file.

grep -v doesn't work because the list is too long and I get a "can't fork" error. Same thing happens with sed. Does anyone know a way to accomplish this?

[tpl]

welcome to the forum

how about something like this?

let A be the list 0f 8000, and B the list of
2000 that you want to remove.

cat B>>A # tacks B onto end of A
sort A>C
uniq -u C>D # writes unique items--those
# not in both A and B, to D

[primowalker1960]

I followed the instructions, but the file I ended up with has thousands of duplicate entries.

[tpl]

let us have 2 file samples please (short ones)

[primowalker1960]

Ok, upon a closer inspection, I see that it did work, but in my final output, I have numerous duplicate entries. I only want one of each server name in there.

Here an example:

linux1044
linux1045
linux1045
linux1046
linux1046
linux1047
linux1047
linux1048
linux1048
linux1049
linux1049
linux105
linux1050
linux1050

I just need to get the extra ones out of the file.

[tpl]

feed the file to "uniq" again, without the '-u' thus

uniq <D >E