You can use the following commands, as superuser, to clear the systemd logs: Keep the last 7 days: journalctl --vacuum-time=7d Keep the last 100Mb: journalctl --vacuum-size=100M

It is sometimes required to only have a mailbox in ISPConfig for login purposes. For example: to allow Gmail to send email in the name of that person. But without actually saving the mail in the…

List running processes and sort by CPU Get-Process | Sort-Object -Property cpu -Descending

Within PowerShell you can also see when a LOCAL user last logged in. This can be done with the following one-liner: $([ADSI]"WinNT://$env:COMPUTERNAME").Children | where {$_.SchemaClassName -eq…

With PowerShell you can also find files which are larger than a certain size. This can be accomplished with the command below. In this example we are looking for files larger than 100MB, on the C…

If you want to test a firewall rule while the application isn't ready yet, you can open that port on the Windows server using PowerShell. This way you can test the firewall functionality. This can be…

Performance issues. Everybody has had them at least once, and more :) If you are using Windows 2012+ and PowerShell, you can use the Get-Counter command in order to provide you with more information…

If you want to configure the DNS suffix search list on Windows 2012+, you can use the set-DnsclientGlobalSetting command, as shown in the example below. This will set the DNS search list to…

Sometimes there are some applications which take the 'first network card' in order to send/receive traffic. If you have multiple network cards, this can be problematic of course. In case you want to…

Is your postfix mail queue full of spam? You are not the only one :) In that case it could be interesting to clear your queue before the spam gets sent out. In order to remove all mail from the…