删除文件中的前 n 行（带有许多“奇怪”符号的 .zip 文件）

Question

This powershell code delete first 4 lines in file

(gc "old.zip" | select -Skip 4) | sc "new.zip"

But old.zip file has Unix (LF) line endings

And this code also converts file line endings to Windows (CR LF)

How to delete first 4 lines without converting ?

Because of the presence of many "strange" symbols in .zip , other ways to remove the first n lines in a .zip file do not work. For example, more than +4 "old.zip"> "new.zip" in cmd does not work, etc.

Through powershell something like it is removed but also not without problems.

Do you know other ways to remove the first n lines in a .zip file ?

Answer 1

somthing like this?

$PathZipFile="c:\temp\File_1.zip"
$NewPathZipFile="c:\temp\NewFile_1.zip"

#create temporary directory name
$TemporyDir=[System.IO.Path]::Combine("c:\temp", [System.IO.Path]::GetRandomFileName())

#extract archive into temporary directory
Expand-Archive "c:\temp\File_1.zip" -DestinationPath $TemporyDir

#loop file for remove 4 first lines for every files and compress in new archive
Get-ChildItem $TemporyDir -file | %{

    (Get-Content $_.FullName | select -Skip 4) | Set-Content -Path $_.FullName;
    Compress-Archive $_.FullName $NewPathZipFile -Update

}

Remove-Item  $TemporyDir -Recurse -Force

Answer 2

PowerShell:

(gc "old.txt" | select -Skip 4 | Out-String) -replace "`r`n", "`n" | Out-File "new.txt"

C#:

File.WriteAllText("new.txt", string.Join("\n", File.ReadLines("old.txt").Skip(4)));