[问题求助] 使用powershell 修改host文件

$IP_URL = "127.0.0.1 www.bing.com"

if ((Get-Content $env:windir\System32\drivers\etc\hosts | ?{ $_ -match "$($IP_URL -replace '\s+','\s+')" }) -eq $null)
{
	"$IP_URL" | ac "$env:windir\System32\drivers\etc\hosts"
	echo "已添加！"
}
else
{
	echo "已存在"
}
复制代码

$IP_URL = "127.0.0.1 www.bing.com"
$IP_URL11 = "127.0.0.1   www.bing.com"
$IP_URL -match $IP_URL11
$IP_URL -match "$($IP_URL11 -replace '\s+','\s+')"
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$IP_URL = @(
        "127.0.0.1 www.bing.com"
        "127.0.0.1 www.sina.com"
)

$IP_URL -notmatch "$((Get-Content $env:windir\System32\drivers\etc\hosts | ?{ $_ -match "$($IP_URL -join '|')"}) -join '|')"|ac "$env:windir\System32\drivers\etc\hosts"
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# Uncomment lines with localhost on them:
$hostsPath = "$env:windir\System32\drivers\etc\hosts"
$hosts = get-content $hostsPath
$hosts = $hosts | Foreach {if ($_ -match '^\s*#\s*(.*?\d{1,3}.*?localhost.*)')
                           {$matches[1]} else {$_}}
$hosts | Out-File $hostsPath -enc ascii

# Comment lines with localhost on them:
$hosts = get-content $hostsPath
$hosts | Foreach {if ($_ -match '^\s*([^#].*?\d{1,3}.*?localhost.*)') 
                  {"# " + $matches[1]} else {$_}} |
         Out-File $hostsPath -enc ascii
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function setHostEntries([hashtable] $entries) {
    $hostsFile = "$env:windir\System32\drivers\etc\hosts"
    $newLines = @()

    $c = Get-Content -Path $hostsFile
    foreach ($line in $c) {
        $bits = [regex]::Split($line, "\s+")
        if ($bits.count -eq 2) {
            $match = $NULL
            ForEach($entry in $entries.GetEnumerator()) {
                if($bits[1] -eq $entry.Key) {
                    $newLines += ($entry.Value + '     ' + $entry.Key)
                    Write-Host Replacing HOSTS entry for $entry.Key
                    $match = $entry.Key
                    break
                }
            }
            if($match -eq $NULL) {
                $newLines += $line
            } else {
                $entries.Remove($match)
            }
        } else {
            $newLines += $line
        }
    }

    foreach($entry in $entries.GetEnumerator()) {
        Write-Host Adding HOSTS entry for $entry.Key
        $newLines += $entry.Value + '     ' + $entry.Key
    }

    Write-Host Saving $hostsFile
    Clear-Content $hostsFile
    foreach ($line in $newLines) {
        $line | Out-File -encoding ASCII -append $hostsFile
    }
}

$entries = @{
    'aaa.foo.local' = "127.0.0.1"
    'bbb.foo.local' = "127.0.0.1"
    'ccc.foo.local' = "127.0.0.1"
};
setHostEntries($entries)
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$domainName = "www.abc.com"
$rplaceStr = ""
$rHost = "C:\Windows\System32\drivers\etc\hosts"
$items = Get-Content $rHost | Select-String $domainName
Write-host $items
foreach( $item in $items)
{
(Get-Content $rHost) -replace $item, $rplaceStr| Set-Content $rHost
}
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$Hosts = "$env:windir\System32\drivers\etc\hosts"

$urls = @(
	"www.baidu.com"
	"www.bing.com"
) |
foreach{
	if ((gc $Hosts | Select-String $_) -eq $null)
	{
		ac $hosts "127.0.0.1 $_"
	}
}
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$IP_URL = @(
        "127.0.0.1 www.bing.com"
        "127.0.0.1 www.sina.com"
)
$a=(Get-Content "$env:windir\System32\drivers\etc\hosts" | ?{ $_ -match "$($IP_URL -join '|')"}) -join '|'
if ($a -eq '')
{
	$IP_URL | ac "$env:windir\System32\drivers\etc\hosts"
	echo "已添加！"
}
else
{
	$IP_URL -notmatch "$a" | ac "$env:windir\System32\drivers\etc\hosts"
	echo "已存在"
}
复制代码

$Hosts = "$env:windir\System32\drivers\etc\hosts"
$a=gc $Hosts
$urls = @(
	"www.baidu.com"
	"www.bing.com"
) |
foreach{
if($a[-1] -ne ''){ac $hosts ''}elseif ((gc $Hosts | Select-String $_) -eq $null)
	{
		ac $hosts "127.0.0.1 $_"
	}
}
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