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Nice. Thank You

I need help removing the last character of every line if it is a certain character. For example I need to get rid of a % character if it is in the last position.

Input:
aaa%
%bbb
ccc
d%dd%
...

It is only 2gigs but for some reason it uses more than 8gigs of memory

It should get the lines in file1.txt not found in file2.txt For example:

File1:

000
555
aaa
ccc
jjj
zzzFile 2:

000
ccc
111
hhh
vvvwhen I run the command it should get:

555
aaa...

Thanks for your all of your help and suggestions. That sort -m seems to work the best.

I have a diff command that does what I want but when comparing large text/log files, it uses up all the memory I have (sometimes over 8gig of memory)


diff file1.txt file2.txt | grep '^<'| awk...

Thanks for the reply, but that doesn't seem to be working. It could be I am doing it wrong. Could you explain what that nawk command is doing?

Hello,

I am trying to add a line (usually just a word) to some text files in a directory that are already sorted. I just don't want to run the sort command again because it can take a long time...