How to remove the first 3 symbols in a text file?

Question

如何使用PowerShell删除文本文件中的前3个符号并保持文件名称相同？

Answer 1

Just read the file using the Get-Content cmdlet, remove the file using a regex that replaces the first three characters with nothing and finally write it back using the Set-Content cmdlet:

(Get-Content 'yourfilePath.txt' -raw) -replace '^...' | Set-Content 'yourfilePath.txt'

Note: You probably want to specify the encoding using the -Encoding parameter when writing the content back to the file.