Sysctl Command Explanation

Turn

Personal General sysctl-p or sysctl-a more use

Sysctl The kernel parameters that are configured and displayed in the/proc/sys directory. You can use Sysctl to set up or reset networking features such as IP forwarding, IP fragment removal, and source routing checks. Users only need to edit the/etc/sysctl.conf file to manually or automatically perform the functions controlled by sysctl.

Command format:

Sysctl [-n] [-e]-W variable=value

Sysctl [-n] [-e]-P <filename> (default/etc/sysctl.conf)

Sysctl [-n] [-e]-A

The meaning of common parameters:

-W temporarily changes the value of a specified parameter, such as

Sysctl-w net.ipv4.ip_forward=1

-a displays all system parameters

-P loads the system parameters from the specified file, which is loaded from the/etc/sysctl.conf if not specified

If you just want to temporarily change the value of a system parameter, you can do it in two ways, for example, to enable the IP routing forwarding feature:

1) #echo 1 >/proc/sys/net/ipv4/ip_forward

2) #sysctl-W net.ipv4.ip_forward=1

Both of these methods may immediately turn on routing, but if the system restarts, or the

# Service Network Restart

command, the value you set is lost and you can modify the/etc/sysctl.conf file if you want to permanently retain the configuration

Change Net.ipv4.ip_forward=0 to Net.ipv4.ip_forward=1

Sysctl Command Explanation