使用sed修改文件

Question

I have a file in this format

[file1]
username = admin
password = *****
ips = X.X.X.X
port = 8000

[file2]
username = admin
password = *****
ips = X.X.X.X
port = 8000

I want to modify the username and password for both sections in the file using a bash script.

I need the output to be:

[file1]
username = user1
password = user1
ips = X.X.X.X
port = 8000

[file2]
username = user2
password = user2
ips = X.X.X.X
port = 8000

This is the sed command which I tried:

sed 's/username = admin/username = user1/' file [file1] username = user1 password = ***** ips = X.X.X.X port = 8000 [file2] username = user1 password = ***** ips = X.X.X.X port = 8000

I am trying to use a sed command to achieve this but it finds and replaces all usernames and passwords with same value. Can anyone help me sort this out?

sed 's/username = admin/username = user1/' x
[file1]
username = user1
password = *****
ips = X.X.X.X
port = 8000

[file2]
username = user1
password = *****
ips = X.X.X.X
port = 8000

Appreciate your help in advance!

-W

Answer 1

Could you please try following.

Solution 1st: Taking the number from file string in the line and then adding it to user and password string lines.

awk '/file/{val=$0;gsub(/[a-zA-Z]|+|\[|\]/,"",val)} /^user/||/^password/{$NF="user"val} 1'  Input_file

Solution 2nd: In this approach simply having a variable count which will be incremented by 1 each time it sees file string on it.

awk '/file/{count++} /^user/||/^password/{$NF="user"count} 1' Input_file

In case you want to save output into Input_file itself append > temp_file && mv temp_file Input_file in above codes too.