如何在 PowerShell 中使用 -match 匹配特定字符串

Question

I have a text (.txt) file, example shown below:

1 SHA1 <KEY1>
2 SHA1 <KEY2>
10 SHA1 <KEY3>
11 SHA1 <KEY4>
20 SHA1 <KEY5>
21 SHA1 <KEY6>

To get the required output, I use:

$content = Get-Content -Path C:\Files\test.txt
$content -match "10 SHA1"
10 SHA1 <KEY3>

All fine so far.

$content -match "20 SHA1"
20 SHA1 <KEY5>

Still the expected output, all good.

$content -match "1 SHA1"
1 SHA1 <KEY1>
11 SHA1 <KEY4>
21 SHA1 <KEY6>

Not good. Desired output:

1 SHA1 <KEY1>

How can I get an exact match using -match ?

Answer 1

It matches all 3. If you use a start of line anchor, then it will work.

@"
1 SHA1 <KEY1>
2 SHA1 <KEY2>
10 SHA1 <KEY3>
11 SHA1 <KEY4>
20 SHA1 <KEY5>
21 SHA1 <KEY6>
"@ -split '\r?\n' -match "^1 SHA1"

1 SHA1 <KEY1>