sysadmin horror stories
When CSF (ConfigServer Firewall) announced it was closing, it left a big hole in the Linux hosting world.CSF had been the de-facto standard for years — a reliable mix of iptables, Perl scripts, and clever wrappers that kept countless servers secure. But for those of us who’ve been running modern systems, one question was already … Read more
Growing a Linux VM disk can usually be done online, including the root filesystem. First identify what sits between the virtual disk and the mount point: a plain partition, or LVM with ext4 or XFS on top. The original version of this post was the short growpart + resize2fs recipe. That works for ext4 on … Read more
The problem looks like the device ‘disappears’ from the bus, and becomes inaccessible to the driver. If it happens early – the driver will not load, if it happens later – it may fail with sporadic access errors cat /sys/module/pcie_aspm/parameters/policy grubby –update-kernel ALL –args “pcie_aspm.policy=performance pcie_port_pm=off pcie_aspm=off” dracut -f ethtool -K eno1 tso off gso … Read more
Configure Automatic Security Update (Unattended Upgrades) on Ubuntu Server First, install the unattended-upgrades package. sudo apt update sudo apt install unattended-upgrades You need to install the update-notifier-common package in order to set up automatic reboot. sudo apt install update-notifier-common Then edit the 50unattended-upgrades file. sudo nano /etc/apt/apt.conf.d/50unattended-upgrades In this file, you can configure what packages should be automatically updated. By default, … Read more