如何在 unix 中编写两个关键值

Question

我有两个文件。需要比较两个文件并通过 unix unix shell 脚本覆盖从 test2.txt 到 test1.txt 的值。 如果有的话 应该在test1中添加额外的键.txt

注意：只需要覆盖值而不是键。

测试1.txt

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375

测试2.txt

Name = Ram
Age =35
DOB = 23-Aug-95
Total Marks =300
Remarks = He is very good

预期盈亏

测试3.txt

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375
Remarks = He is very good

Answer 1

使用 awk：

$ awk 'BEGIN{FS=" *="}NR==FNR{a[$1]=$0;next}{print ($1 in a?a[$1]:$0)}' file1 file2

输出：

Name = krishna
Age =30
DOB = 30-Sep-94
Total Marks =375
Remarks = He is very good