uniq 排序 -c 去重
[root@aminglinux01 ~]# sort 2.txt
1
1
1
123
123
2
2
2
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
21
3
abc
abc 1111,222
[root@aminglinux01 ~]# sort 2.txt | uniq
1
123
2
21
3
abc
abc 1111,222
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