老外写的一个比较经典的powershell example
# Functionto check if $Server is online
FunctionCanPing ($Server) {
$error.clear()
$tmp = Test-Connection $Server -ErrorActionSilentlyContinue
if ($?) {
Write-Host "Ping succeeded:$Server"; Return $true
}
else {
Write-Host "Ping failed:$Server."; Return $false
}
}
# Functionto check if $Server is remotely accessible
FunctionCanRemote ($Server) {
$s = New-PSSession $Server -AuthenticationCredssp -Credential $Credentials -Name "Test" -ErrorActionSilentlyContinue
if ($s -is[System.Management.Automation.Runspaces.PSSession]) {
Enter-PSSession -Session $s
Exit-PSSession
Write-Host "Remote test succeeded:$Server."; Return $true
}
else {
Write-Host "Remote test failed:$Server."; Return $false
}
}
# Executefunctions to check $Server
if ($Server-ne "UNC") {
if (CanPing $Server) {
if (-Not (CanRemote $Server)) {
Write-Host "Exit loop REMOTE"-ForegroundColor Yellow
continue
}
}
else {
Write-Host "Exit loop PING"-ForegroundColor Yellow
continue # ‘continue‘ to the nextobject and don‘t execute the rest of the code, ‘break‘ exits the foreach loopcompletely
}
}
改进:
# Function to check if $Server is remotely accessible
Function CanRemote ($Server) {
Try {
$s = New-PSSession $Server -Authentication Credssp -Credential $Credentials -Name "Test" -ErrorAction Stop
Write-Host "Remote test succeeded: $Server."
$true
Remove-PSSession $s
}
Catch {
"Remote test failed: $Server."
$false
}
}