Regex Select user names with X.

User names consist of a-z upper and lower case followed by 6 digits. Example. A123456 or B459087 or U997345.
I have a list that contains other names like Administrator or JoeSmith other than the users names above.
I would like to only see the User names "[a-z]123456".
Xytras1Asked:
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käµfm³d 👽Commented:
What is your question?
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Xytras1Author Commented:
Opps should of said a little more.

I have a List of User names  that consist of a-z upper and lower case followed by 6 digits. Example. A123456 or B459087 or U997345. Also the list that contains other names like Administrator or JoeSmith other than the users names above.
I would like to only see the User names "[a-z]123456".
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käµfm³d 👽Commented:
I still don't see a question   : \

Are you asking what the pattern that would match the above should be, or are you asking how to do a regex search in PowerShell, or are you asking something else?
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footechCommented:
Perhaps you're trying to read from a file and want to only display names that match your criteria?
get-content file.txt | Where { $_ -match "[a-z][0-9]{6}" }

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Xytras1Author Commented:
This should help with my poor English sorry.

$OldList =  "A123456, B459087, U997345, JoeSmith, Administrator"

$NewList = "A123456, B459087, U997345"

Trying to filter out non standard user names.
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Xytras1Author Commented:
footech.

get-content file.txt | Where { $_ -match "[a-z][0-9]{6}" }

Is pretty close. Any way to make it match exactly?
Getting some false positives like "CPAOLAM3334988"
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oBdACommented:
You need to anchor the match: "^[a-z]\d{6}$"
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Xytras1Author Commented:
"^[a-z]\d{6}$" Works. Thank you.
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