sysctl

sysctl is a system call and administrator command for configuring kernel parameters. It takes parameters from the following files (in order):

• /proc/sys
• /etc/sysctl.d/*.conf
• /run/sysctl.d/*.conf
• /usr/local/lib/sysctl.d/_.conf
• /usr/lib/sysctl.d/_.conf
• /lib/sysctl.d/_.conf
• /etc/sysctl.conf

Calling sysctl -a will output all¹ kernel parameters to stdout

Further reading:

• https://man7.org/linux/man-pages/man8/sysctl.8.html
• man sysctl

Footnotes

1. Except those that are forbidden from being read. ↩