When you ZFS Pool runs out on Proxmox
5 October 2025
8:45 am
Background When your ZFS pool runs out on Proxmox, your entire host and possibly many of the VMs will crash and stop working. You won’t
Knowledgebase
5.7.1 Your access to submit messages to this e-mail system has been rejected. Talos Intelligence Cisco Bullshit
4 October 2025
10:00 am
The new kid on the block with their opaque error messages in so called “spam protection” is Cisco Talos Piece of Shit Intelligence. If you
How to fix ERROR 1101 (42000) at line 123: BLOB, TEXT, GEOMETRY or JSON column ‘whatever’ can’t have a default value
2 October 2025
4:49 am
It’s probably a TEXT column with a default. For example, do this: user@example:~$ ssh -p 22 [email protected] “MYSQL_PWD=’OwMewBIaeut2fHRVrwoB’ mysql -u db_user db_name -e \”ALTER TABLE
After upgrade from Mongo 4.x to 8.x on old server, bsonSerialize() compatibility issue
26 September 2025
2:53 am
If you upgrade from Mongo 4.x to 8.x and MongoDB stops working with: PHP Fatal error: Declaration of MongoDB\Model\BSONArray::bsonSerialize() must be compatible with MongoDB\BSON\Serializable::bsonSerialize(): stdClass|MongoDB\BSON\Document|MongoDB\BSON\PackedArray|array
How to disable proftpd on Virtualmin because fail2ban is showing events
26 September 2025
2:06 am
Webmin -> System -> Bootup and Shutdown
How to add multiple PHP versions to Virtualmin
28 October 2025
If you came here to upgrade CentOS 7’s PHP to version PHP 8.0/8.1, you’re at the right place. The new documentation doesn’t mention CentOS 7
How to set the timezone in Linux and other useful time and locale commands
21 October 2025
To set the timezone in Debian/Ubuntu or CentOS, see these examples: timedatectl set-timezone Europe/Berlin timedatectl set-timezone Europe/London timedatectl set-timezone Africa/Johannesburg timedatectl set-timezone America/Los_Angeles For a
SNMP Configuration (snmpd.conf) Cheat Sheet
16 October 2025
A curated list of SNMP commands and parameters. The article aims to highlight differences between RedHat (e.g. AlmaLinux/CentOS) based distributions and Debian (e.g. Ubuntu) based
ZFS Primer
8 October 2025
Finding Run Away ZFS Disks Sometimes your ZFS drives on your disk runs away with you. Then you quickly need commands to see what ZFS
Virtualmin doesn’t upgrade: How to fix invalid signature Virtualmin apt packages
7 October 2025
Whilst updating Virtualmin, you might get this error: Err:6 https://software.virtualmin.com/vm/6/gpl/apt virtualmin-focal InRelease The following signatures were invalid: EXPKEYSIG D9F9010760D62A6B Virtualmin, Inc. (Package signing key for