Linux kernel parameter

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Location: /proc/sys

Check: cat /proc/sys/net/ipv4/icmp_echo_ignore_all

Change
Temporary Change
1. echo <value> > <file>
Example: echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
2. sysctl -w <value > <file> 

Permanent Change
1. Change the file /etc/sysctl.conf
2. Make the change: sysctl -p 

Save: sysctl -a > <file>


Load: sysctl -f <file> -p

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