立即删除重复的行，忽略第一个字段
我试着离开（星星只是在这里表明我要保留哪条线）
*2020-12-15 19:10:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:20:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:30:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
*2020-12-15 19:40:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);100.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:50:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);100.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
*2020-12-15 20:00:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
到
2020-12-15 19:10:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:40:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);100.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 20:00:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
我想在不考虑日期的情况下从一组相同的行中删除重复的行，但我不知道如何去做。我尝试从第二个参数进行排序，但它没有考虑“组”行
cat <my file> | sort -t";" -k2 -u
给我那个
2020-12-15 19:40:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);100.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:10:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
有人有想法吗？
回答
给定-m标志，sort假设输入已经排序并且不再排序；这正是您在这里寻找的。
$ sort -m -t';' -k2 -u <file
2020-12-15 19:10:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 19:40:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);100.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm
2020-12-15 20:00:00;34min 8s (min: 32s; max 34min 8s);normal;4;2;91EECB0E;1us (-24);78.688ms (max: 5s);-50.923ms;103.234ms;25.637ms;70;-5,050ppm