#!/bin/sh # Check for root user CURR_USER=`/usr/bin/whoami` if [ "$CURR_USER" != "root" ]; then echo "I need root rights... Please login from root" exit fi # Disable ping reply Permanently # You can permanently disable the ping reply using the following method. # Step 1: Edit the sysctl.conf file and add the following line. # net.ipv4.icmp_echo_ignore_all = 1 # Step 2: Execute sysctl -p to enforce this setting immediately. # sysctl -p # The above command loads the sysctl settings from the sysctl.conf file. echo "1" > /proc/sys/net/ipv4/icmp_echo_ignore_all