#!/usr/bin/env bash
Green_font_prefix="\033[32m"
Red_font_prefix="\033[31m"
Font_color_suffix="\033[0m"
Info="${Green_font_prefix}[信息]${Font_color_suffix}"
Error="${Red_font_prefix}[错误]${Font_color_suffix}"
Tip="${Green_font_prefix}[注意]${Font_color_suffix}"
copyright(){
clear
echo "\
############################################################
Linux网络优化脚本
Powered by NNC.SH
############################################################
"
}
tcp_tune(){ # 优化TCP窗口
sed -i '/net.ipv4.tcp_no_metrics_save/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_ecn/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_frto/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_mtu_probing/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_rfc1337/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_sack/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_fack/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_window_scaling/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_adv_win_scale/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_moderate_rcvbuf/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_rmem/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_wmem/d' /etc/sysctl.conf
sed -i '/net.core.rmem_max/d' /etc/sysctl.conf
sed -i '/net.core.wmem_max/d' /etc/sysctl.conf
sed -i '/net.ipv4.udp_rmem_min/d' /etc/sysctl.conf
sed -i '/net.ipv4.udp_wmem_min/d' /etc/sysctl.conf
sed -i '/net.core.default_qdisc/d' /etc/sysctl.conf
sed -i '/net.ipv4.tcp_congestion_control/d' /etc/sysctl.conf
cat >> /etc/sysctl.conf << EOF
net.ipv4.tcp_no_metrics_save=1
net.ipv4.tcp_ecn=0
net.ipv4.tcp_frto=0
net.ipv4.tcp_mtu_probing=0
net.ipv4.tcp_rfc1337=0
net.ipv4.tcp_sack=1
net.ipv4.tcp_fack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_adv_win_scale=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=33554432
net.core.wmem_max=33554432
net.ipv4.tcp_rmem=4096 87380 33554432
net.ipv4.tcp_wmem=4096 16384 33554432
net.ipv4.udp_rmem_min=8192
net.ipv4.udp_wmem_min=8192
net.core.default_qdisc=fq
net.ipv4.tcp_congestion_control=bbr
EOF
sysctl -p && sysctl --system
}
enable_forwarding(){ #开启内核转发
sed -i '/net.ipv4.conf.all.route_localnet/d' /etc/sysctl.conf
sed -i '/net.ipv4.ip_forward/d' /etc/sysctl.conf
sed -i '/net.ipv4.conf.all.forwarding/d' /etc/sysctl.conf
sed -i '/net.ipv4.conf.default.forwarding/d' /etc/sysctl.conf
cat >> '/etc/sysctl.conf' << EOF
net.ipv4.conf.all.route_localnet=1
net.ipv4.ip_forward=1
net.ipv4.conf.all.forwarding=1
net.ipv4.conf.default.forwarding=1
EOF
sysctl -p && sysctl --system
}
banping(){
sed -i '/net.ipv4.icmp_echo_ignore_all/d' /etc/sysctl.conf
sed -i '/net.ipv4.icmp_echo_ignore_broadcasts/d' /etc/sysctl.conf
cat >> '/etc/sysctl.conf' << EOF
net.ipv4.icmp_echo_ignore_all=1
net.ipv4.icmp_echo_ignore_broadcasts=1
EOF
sysctl -p && sysctl --system
}
unbanping(){
sed -i "s/net.ipv4.icmp_echo_ignore_all=1/net.ipv4.icmp_echo_ignore_all=0/g" /etc/sysctl.conf
sed -i "s/net.ipv4.icmp_echo_ignore_broadcasts=1/net.ipv4.icmp_echo_ignore_broadcasts=0/g" /etc/sysctl.conf
sysctl -p && sysctl --system
}
ulimit_tune(){
echo "1000000" > /proc/sys/fs/file-max
sed -i '/fs.file-max/d' /etc/sysctl.conf
cat >> '/etc/sysctl.conf' << EOF
fs.file-max=1000000
EOF
ulimit -SHn 1000000 && ulimit -c unlimited
echo "root soft nofile 1000000
root hard nofile 1000000
root soft nproc 1000000
root hard nproc 1000000
root soft core 1000000
root hard core 1000000
root hard memlock unlimited
root soft memlock unlimited
* soft nofile 1000000
* hard nofile 1000000
* soft nproc 1000000
* hard nproc 1000000
* soft core 1000000
* hard core 1000000
* hard memlock unlimited
* soft memlock unlimited
">/etc/security/limits.conf
if grep -q "ulimit" /etc/profile; then
:
else
sed -i '/ulimit -SHn/d' /etc/profile
echo "ulimit -SHn 1000000" >>/etc/profile
fi
if grep -q "pam_limits.so" /etc/pam.d/common-session; then
:
else
sed -i '/required pam_limits.so/d' /etc/pam.d/common-session
echo "session required pam_limits.so" >>/etc/pam.d/common-session
fi
sed -i '/DefaultTimeoutStartSec/d' /etc/systemd/system.conf
sed -i '/DefaultTimeoutStopSec/d' /etc/systemd/system.conf
sed -i '/DefaultRestartSec/d' /etc/systemd/system.conf
sed -i '/DefaultLimitCORE/d' /etc/systemd/system.conf
sed -i '/DefaultLimitNOFILE/d' /etc/systemd/system.conf
sed -i '/DefaultLimitNPROC/d' /etc/systemd/system.conf
cat >>'/etc/systemd/system.conf' <<EOF
[Manager]
#DefaultTimeoutStartSec=90s
DefaultTimeoutStopSec=30s
#DefaultRestartSec=100ms
DefaultLimitCORE=infinity
DefaultLimitNOFILE=65535
DefaultLimitNPROC=65535
EOF
systemctl daemon-reload
}
bbr(){
if uname -r|grep -q "^5."
then
echo "已经是 5.x 内核，不需要更新"
else
wget -N "http://sh.nekoneko.cloud/bbr/bbr.sh" -O bbr.sh && bash bbr.sh
fi
}
Update_Shell(){
wget -N "http://sh.nekoneko.cloud/tools.sh" -O tools.sh && chmod +x tools.sh && ./tools.sh
}
get_opsy() {
[ -f /etc/redhat-release ] && awk '{print ($1,$3~/^[0-9]/?$3:$4)}' /etc/redhat-release && return
[ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return
[ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return
}
virt_check() {
# if hash ifconfig 2>/dev/null; then
# eth=$(ifconfig)
# fi
virtualx=$(dmesg) 2>/dev/null
if [[ $(which dmidecode) ]]; then
sys_manu=$(dmidecode -s system-manufacturer) 2>/dev/null
sys_product=$(dmidecode -s system-product-name) 2>/dev/null
sys_ver=$(dmidecode -s system-version) 2>/dev/null
else
sys_manu=""
sys_product=""
sys_ver=""
fi
if grep docker /proc/1/cgroup -qa; then
virtual="Docker"
elif grep lxc /proc/1/cgroup -qa; then
virtual="Lxc"
elif grep -qa container=lxc /proc/1/environ; then
virtual="Lxc"
elif [[ -f /proc/user_beancounters ]]; then
virtual="OpenVZ"
elif [[ "$virtualx" == *kvm-clock* ]]; then
virtual="KVM"
elif [[ "$cname" == *KVM* ]]; then
virtual="KVM"
elif [[ "$cname" == *QEMU* ]]; then
virtual="KVM"
elif [[ "$virtualx" == *"VMware Virtual Platform"* ]]; then
virtual="VMware"
elif [[ "$virtualx" == *"Parallels Software International"* ]]; then
virtual="Parallels"
elif [[ "$virtualx" == *VirtualBox* ]]; then
virtual="VirtualBox"
elif [[ -e /proc/xen ]]; then
virtual="Xen"
elif [[ "$sys_manu" == *"Microsoft Corporation"* ]]; then
if [[ "$sys_product" == *"Virtual Machine"* ]]; then
if [[ "$sys_ver" == *"7.0"* || "$sys_ver" == *"Hyper-V" ]]; then
virtual="Hyper-V"
else
virtual="Microsoft Virtual Machine"
fi
fi
else
virtual="Dedicated母鸡"
fi
}
get_system_info() {
cname=$(awk -F: '/model name/ {name=$2} END {print name}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//')
#cores=$(awk -F: '/model name/ {core++} END {print core}' /proc/cpuinfo)
#freq=$(awk -F: '/cpu MHz/ {freq=$2} END {print freq}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//')
#corescache=$(awk -F: '/cache size/ {cache=$2} END {print cache}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//')
#tram=$(free -m | awk '/Mem/ {print $2}')
#uram=$(free -m | awk '/Mem/ {print $3}')
#bram=$(free -m | awk '/Mem/ {print $6}')
#swap=$(free -m | awk '/Swap/ {print $2}')
#uswap=$(free -m | awk '/Swap/ {print $3}')
#up=$(awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60} {printf("%d days %d hour %d min\n",a,b,c)}' /proc/uptime)
#load=$(w | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//')
opsy=$(get_opsy)
arch=$(uname -m)
#lbit=$(getconf LONG_BIT)
kern=$(uname -r)
# disk_size1=$( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|overlay|shm|udev|devtmpfs|by-uuid|chroot|Filesystem' | awk '{print $2}' )
# disk_size2=$( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|overlay|shm|udev|devtmpfs|by-uuid|chroot|Filesystem' | awk '{print $3}' )
# disk_total_size=$( calc_disk ${disk_size1[@]} )
# disk_used_size=$( calc_disk ${disk_size2[@]} )
#tcpctrl=$(sysctl net.ipv4.tcp_congestion_control | awk -F ' ' '{print $3}')
virt_check
}
menu() {
echo -e "\
${Green_font_prefix}0.${Font_color_suffix} 升级脚本
${Green_font_prefix}1.${Font_color_suffix} 安装BBR原版内核(已经是5.x的不需要)
${Green_font_prefix}2.${Font_color_suffix} TCP窗口调优
${Green_font_prefix}3.${Font_color_suffix} 开启内核转发
${Green_font_prefix}4.${Font_color_suffix} 系统资源限制调优
${Green_font_prefix}5.${Font_color_suffix} 屏蔽ICMP ${Green_font_prefix}6.${Font_color_suffix} 开放ICMP
"
get_system_info
echo -e "当前系统信息: ${Font_color_suffix}$opsy ${Green_font_prefix}$virtual${Font_color_suffix} $arch ${Green_font_prefix}$kern${Font_color_suffix}
"
read -p "请输入数字: " num
case "$num" in
0)
Update_Shell
;;
1)
bbr
;;
2)
tcp_tune
;;
3)
enable_forwarding
;;
4)
ulimit_tune
;;
5)
banping
;;
6)
unbanping
;;
*)
clear
echo -e "${Error}:请输入正确数字 [0-99]"
sleep 5s
start_menu
;;
esac
}
copyright
menu