為什麼此命令不根據 uniq 計數進行排序？

我在日誌中有類似於以下內容的行：

2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.11:61618) is not a trusted source.
2015/11/02-07:55:40.515 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.11:51836) is not a trusted source.
2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.10:61615) is not a trusted source.
2015/11/02-07:55:40.515 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.10:51876) is not a trusted source.
2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.10:61614) is not a trusted source.
2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.15:61614) is not a trusted source.
2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.15:61618) is not a trusted source.
2015/11/02-07:55:39.735 INFO failed with ERR_AUTHORIZATION_REQUIRED.  (10.10.10.15:61613) is not a trusted source.

因此，我嘗試了以下命令來獲取每個 uniq IP 的計數，並排序：

grep ERR_AUTHORIZATION_REQUIRED file.log | awk '{print $6}' | cut -s -d ':' -f1 | tr -d '(' | sort | uniq -c

我得到的輸出類似於以下內容：

3 10.10.10.10
2 10.10.10.11
3 10.10.10.15

所以這就像在應用之前對 IP 進行排序uniq -c（這對於給定命令是有意義的），但是如果我交換uniqandsort命令，每個 IP 都會列印1.

從uniq手冊頁：

DESCRIPTION
    Discard all but one of successive identical lines from INPUT (or standard input), writing to OUTPUT (or standard output).

這裡的關鍵詞是“連續的”。它不會在流中的任何位置搜尋重複項，只搜尋緊隨其後的那些。排序強制所有重複項彼此相鄰，因此可以刪除（併計算）它們。

引用自：https://unix.stackexchange.com/questions/240311