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sysctl

List and change kernel runtime variables.

More information.

• 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

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