Linux Capabilities: Drop Root Without Breaking Everything
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Learn Linux capabilities to drop root privileges without breaking your apps. Master cap_drop, cap_add in Docker, and setcap for fine-grained privilege control.
Tag: kernel
All the articles with the tag "kernel".
Ulimit, Cgroups, and the Art of Stopping Processes From Eating Your Server
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ulimit and cgroups v2: set per-process CPU, memory, and file limits, use systemd slice controls, and keep one runaway service from killing your server.
The Linux OOM Killer: Why It's Killing Your App
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Why Linux kills your app with no warning. Understand the OOM killer, read dmesg logs, and shield critical processes with oom_score_adj and swap.
/proc as a Debugging Tool
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The /proc filesystem is a live window into every running process on Linux. Debug PIDs, file descriptors, memory, and limits with no extra tools installed.
Switch Ubuntu to Hardware Enablement (HWE)
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Running new hardware on Ubuntu LTS? The HWE kernel backports newer kernel and graphics support. Here's how to switch from generic to HWE safely.
Linux distribution info & kernel info
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Find your Linux distro version, kernel version, and architecture with uname, lsb_release, /etc/os-release, and hostnamectl.
Remove all old installed but unused kernels
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Old kernels fill /boot until apt upgrades fail. Clear them with apt autoremove or dpkg purge on Ubuntu and Debian, plus the Proxmox quirk and how many to keep.