How can I find the unique lines and remove all duplicates from a file? My input file is
1
1
2
3
5
5
7
7
I would like the result to be:
2
3
sort file | uniq will not do the job. Will show all values 1 time
Answer
uniq has the option you need:
-u, --unique
only print unique lines
$ cat file.txt
1
1
2
3
5
5
7
7
$ uniq -u file.txt
2
3