Linux & Unix
Send all outgoing email trough one IP address in postfix
When a server has more than one IP address, then postfix will use all IP addresses randomly to send out…
Blocking .exe attachments with postfix or amavisd-new and ISPConfig 3
If you use postfix and / or amavisd-new on the mail server, you can use the following recipes to block…
How to enable DKIM email signatures in amavisd-new and ISPConfig 3.0
NOTE: This post is about ISPConfig 3.0 and not 3.1 and newer. ISPConfig 3.1 and newer has DKIM support builtin,…
[SOLVED] E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
You get the following error message while installing a .deb package on Debian or Ubuntu or while installing Updates? E: Could…
How to Repair VMware Virtual Hard Disk on Windows 10?
To repair a VMware virtual hard disk on Windows 10, go to the VMWare site and download vdiskmanager-windows-7.0.1.exe2.zip (see also https://kb.vmware.com/s/article/1023856) Repair…
VMware Workstation error message: The specified virtual disk needs repair
While expanding VMware workstation, you might get the following error: Error VMware Workstation error message: The specified virtual disk needs…
Where to Download VMware Virtual Disk Manager
To download VMware virtual disk manager, go to the following link: https://sourceforge.net/projects/vmdkutil/?source=typ_redirect
[SOLVED] Error: This Virtual Machine Appears to be in Use
When you get the following error on VMware, try to do the following workaround. Error: This virtual machine appears to…
pure-ftpd does not show more then 2000 files on Debian and Ubuntu
The pure-ftp daemon by default has a recursion limit of 2000 files, this prevents the server from showing more then…