sysctl.d

My personal kernel system variables configuration for web servers.

Files found under the /etc/sysctl.d directory that end with .conf are parsed within sysctl(8) at boot time. If you want to set kernel variables you can either edit /etc/sysctl.conf or make a new file.

The filename isn't important, but don't make it a package name as it may clash with something the package builder needs later. It must end with .conf though.

My personal preference would be for local system settings to go into /etc/sysctl.d/local.conf but as long as you follow the rules for the names of the file, anything will work. See sysctl.conf(8) man page for details of the format.

— `/etc/sysctl.d/README.sysctl`

Installation

sysctl -a > ~/sysctl_defaults.conf
git clone https://github.com/Fleshgrinder/sysctl.d.git
cp sysctl.d/sysctl.conf /etc/sysctl.conf
sysctl -p

References

• Oskar Andreasson: “Ipsysctl-tutorial”, 2002.
• ESnet: “Linux Tuning”, September 22th, 2014.
• nixCraft: “Linux Tune Network Stack (Buffers Size) To Increase Networking Performance”, May 20th, 2009.
• nixCraft: “Linux Kernel /etc/sysctl.conf Security Hardening”, October 27th, 2009.
• nixCraft: “Top 20 Nginx WebServer Best Security Practices”, March 6th, 2010.
• sergioxii: “Nginx and PHP-FPM for heavy load wordpress web server with high traffic 2000+ concurrent connections”, February 26th, 2012.
• The PostgreSQL Global Development Group: “Managing Kernel Resources”, 2014.

License