List and change kernel runtime variables.
- Show all available variables and their values:
sysctl -a
- Set a changeable kernel state variable:
sysctl -w {{section.tunable}}={{value}}
- Get currently open file handlers:
sysctl fs.file-nr
- Get limit for simultaneous open files:
sysctl fs.file-max
- Apply changes from /etc/sysctl.conf:
sysctl -p