If you've recently upgraded your Proxmox VE server from version 8 to version 9 and found yourself staring at a black screen with cryptic GRUB errors, you're not alone. Many users running MD RAID configurations have hit this frustrating issue, and we're here to help you get your server back up an ...

Reducing the size of /dev/pve/root (the root logical volume in a default Proxmox setup using LVM) and extend the space of /dev/pve/data can be done using SystemRescueCD (or any live Linux environment with LVM and filesystem tools).

This i ...

To extract all destinations (i.e., the recipients) from the Postfix mail queue (mailq), you can use the following Bash one-liner:

mailq | awk '/^[A-F0-9]/ {in_msg=1; next} in_msg && /^[ \t]*[^ ]+@[^ ]+/ {print $1}' | sort | uniq

E ...

Here is a step by step guide to configure OpenDKIM with Postfix on Debian 12 bookworm.

We're gonna modify default configuration files to keep only minimal or required settings.

Install openDKIM

sudo apt-get install opendkim opendkim-tools

Conf ...

Sometimes I need to calculate a total disk usage of files older than a specified interval (days, months, years).

Here is a 1 liner to do that:

find . -type f -mtime +7 -print0 | du -hc --files0-from - | tail -n 1

Detailed info ?

Use

If you are in a search for an email archiving solution, MailPiler is a recommend solutions.

If you didn't heard about MailPiler, check out the comparison with MailAr ...