linux 利用cat写入一段文件
cat >> /etc/rc.local <<EOF
sysctl -w net.ipv4.icmp_echo_ignore_all=1
sysctl -w net.ipv4.tcp_syncookies=1
sysctl -w net.ipv4.tcp_synack_retries=3
sysctl -w net.ipv4.tcp_syn_retries=3
EOF
linux 利用cat写入一段文件
cat >> /etc/rc.local <<EOF
sysctl -w net.ipv4.icmp_echo_ignore_all=1
sysctl -w net.ipv4.tcp_syncookies=1
sysctl -w net.ipv4.tcp_synack_retries=3
sysctl -w net.ipv4.tcp_syn_retries=3
EOF