Comparing two files with awk and output non matching lines
awk
Solution
This will be the fastest:
grep -vFxf file2 file1
With awk:
awk 'NR==FNR {exclude[$0];next} !($0 in exclude)' file2 file1
If you don't care that the output is sorted, this is what `comm` is for:
comm -23 <(sort file1) <(sort file2)
Problem
I have two files with uneven columns and I want to compare these two files and remove the matching line from file1 file 1: ``` nt1 ID420 nt1 ID42 nt56 ID6008 ht44 ID555 lt12 ID34 lt12 ID3434 ntt56 ID667 klll ID87693 ``` file2 ``` nt23 ID42 ht44 ID555 lt12 ID3434 ``` Desired ouput: ``` nt1 ID420 nt56 ID6008 lt12 ID34 ntt56 ID667 klll ID87693 ``` I have used below command from earlier post but result is not exactly matching and that is taking initial character for matching. I do not have much exp on awk commands and I need awk single line command or sed or similar shell script to get this output. Thank you well in advance: ``` awk -FS=" " 'NR==FNR {b[$0]; next} {for (x in b) if($0 ~ x) next;print $0}' file2 file1 > outputfile ```