I have two files,
file1.txt contains strings separated by commas:
188.8.131.52,string1,comment1 184.108.40.206,string3,comment3 220.127.116.11,string2,comment2 18.104.22.168,string4,comment4 999.999,999,999,string5,comment5
The second file,
file2.txt, contains strings that can appear in the first column of
file1.txt. I need to remove the whole row in
file1.txt if its first column's string appears in
file2.txt. Please note that I do not want to change th original file, but I want to put the output in a new file.