在Unix中，如何根据字符从文件中随机选择行？

我想根据行中的前几个字符从文件中随机选择行。在我的文件中，前几个字符被命名为“Hybrid:2”、“Hybrid:19”等。我想从每个Hybrid类别中随机选择一个代表行

我有一个格式如下的文件：

Hybrid: 2 Parents: 12 and 49     9.419642 0.000000
Hybrid: 2 Parents: 15 and 49     6.427708 0.000000
Hybrid: 2 Parents: 16 and 49     8.383469 0.000000
Hybrid: 2 Parents: 17 and 49     7.869732 0.000000
Hybrid: 19 Parents: 2 and 23     6.905067 0.000000
Hybrid: 19 Parents: 2 and 30     7.913185 0.000000
Hybrid: 19 Parents: 2 and 57     10.724088 0.000000
Hybrid: 52 Parents: 2 and 23     9.398697 0.000000
Hybrid: 44 Parents: 2 and 30     7.739156 0.000000
Hybrid: 50 Parents: 2 and 30     10.051190 0.000000

Hybrid: 2 Parents: 15 and 49     6.427708 0.000000
Hybrid: 19 Parents: 2 and 23     6.905067 0.000000
Hybrid: 52 Parents: 2 and 23     9.398697 0.000000
Hybrid: 44 Parents: 2 and 30     7.739156 0.000000
Hybrid: 50 Parents: 2 and 30     10.051190 0.000000

我想制作这样的文件：

Hybrid: 2 Parents: 12 and 49     9.419642 0.000000
Hybrid: 2 Parents: 15 and 49     6.427708 0.000000
Hybrid: 2 Parents: 16 and 49     8.383469 0.000000
Hybrid: 2 Parents: 17 and 49     7.869732 0.000000
Hybrid: 19 Parents: 2 and 23     6.905067 0.000000
Hybrid: 19 Parents: 2 and 30     7.913185 0.000000
Hybrid: 19 Parents: 2 and 57     10.724088 0.000000
Hybrid: 52 Parents: 2 and 23     9.398697 0.000000
Hybrid: 44 Parents: 2 and 30     7.739156 0.000000
Hybrid: 50 Parents: 2 and 30     10.051190 0.000000

Hybrid: 2 Parents: 15 and 49     6.427708 0.000000
Hybrid: 19 Parents: 2 and 23     6.905067 0.000000
Hybrid: 52 Parents: 2 and 23     9.398697 0.000000
Hybrid: 44 Parents: 2 and 30     7.739156 0.000000
Hybrid: 50 Parents: 2 and 30     10.051190 0.000000

我认为shuf会有用，但我不知道如何在这里应用它。我不知道如何处理这个问题，所以任何帮助都将不胜感激

获得独特的品系（杂交19、杂交52、杂交44、杂交50、杂交2）。在此之后，洗牌文件。Shuffle将返回文件中行的随机排列。获取洗牌文件的第一行

下面是执行此操作的代码

将下面的脚本复制到一个文件，例如

UniqueLines.sh

#!/bin/bash

filePath=$1
cat $filePath | awk '{print $2}' | uniq > /tmp/unique_ids
for i in `cat /tmp/unique_ids`;do shuf file.txt | grep "Hybrid: $i " | head -1;done;

授予运行脚本的权限

chmod +x UniqueLines.sh

./UniqueLines.sh <full path to file>

Example:
./UniqueLines.sh /root/myfile.txt

运行脚本

chmod +x UniqueLines.sh

./UniqueLines.sh <full path to file>

Example:
./UniqueLines.sh /root/myfile.txt

/UniqueLines.sh
例子：
./UniqueLines.sh/root/myfile.txt