/etc/sysctl.conf

The above commands let the system remember new settings until the next system restart. If you want to make the change permanent you have to edit the file: /etc/sysctl.conf and add the property at the end of the file:

fs.file-max=360000
net.ipv4.ip_local_port_range=1024 65000
net.ipv4.tcp_keepalive_time=60
net.ipv4.tcp_keepalive_probes=3
net.ipv4.tcp_keepalive_intvl=90
net.ipv4.tcp_retries2=4

It will be automatically loaded next time you start the server.

Command:

# sysctl -p

Causes the /etc/systcl.conf to be reloaded which is useful when you have added more parameters to the file and don’t want to restart the server.