hosting.guru blog

Disk cache on virtual machine (KVM/Proxmox)

Posted on February 5, 2026

Some theoretical stuff about different caching for virtual drives: KVM (and by extension Proxmox, which uses KVM) offers several disk cache modes that control how […]

Benchmark, proxmox

Reset email account disk usage stats in cPanel

Posted on January 27, 2026

Sometimes email account disk usage stats are cached for too long. Here are commands, that help fix it: /scripts/remove_dovecot_index_files –user cpaneluser/scripts/generate_maildirsize —verbose -confirm –allaccounts cpanelusermv […]

cPanel

Proxmox – CPU stuck warning

Posted on January 27, 2026

watchdog: BUG: soft lockup – CPU#7 stuck for 22s Annoying bug, makes processes and VMs stuck. Spent several days trying to figure it out. Got […]

Linux, proxmox

Securing ImageMagick installation

Posted on October 14, 2025

Source: https://imagetragick.com/ Read original article, it explains, that specific formats can lead to local command execution. This makes me think and blame it for so […]

Security

Find biggest folder and biggest files

Posted on February 14, 2025

Find 10 biggest folder and files in current folder du -a . | sort -nr | head Find 25 biggest files find . -type f […]

Linux

What to do, if my hosting is slow

Posted on November 25, 2024

What an amazing and simple question, right? You should understand, that term “hosting” refers to a specific computer, specific hardware, set of software applications and […]

Uncategorized