Печать уникальные строки
# -u, --unique
# only print unique lines
$ cat file.txt
1
1
2
3
5
5
7
7
$ uniq -u file.txt
2
3
sort < filea | uniq > fileb
Combative Cormorant
# -u, --unique
# only print unique lines
$ cat file.txt
1
1
2
3
5
5
7
7
$ uniq -u file.txt
2
3
sort < filea | uniq > filebsort < file | uniq > output
cat file | sort | uniq