自用的Debian系开启bbr等网络优化脚本

自用Debian系，网络优化脚本，开启bbr，增大 open files 参数等。
使用方法，新建一个 .bbr 文件，添加下面内容，然后运行 bash .bbr 即可。注意，此脚本运行后，服务器会重启一次。

cd /usr/src && wget -N --no-check-certificate "https://www.kkpig.cn/bbr/.bbr" && chmod +x .bbr && ./.bbr

删掉 /etc/sysctl.conf 里的文件就恢复了。

#!/bin/sh
# Issues https://www.kkpig.cn

if [[ $EUID -ne 0 ]]; then
    clear
    echo "Error: This script must be run as root!"
    exit 1
fi

timedatectl set-timezone Asia/Shanghai

cat >/etc/security/limits.conf<<EOF
* soft     nproc          655360
* hard     nproc          655360
* soft     nofile         655360
* hard     nofile         655360

root soft     nproc          655360
root hard     nproc          655360
root soft     nofile         655360
root hard     nofile         655360

bro soft     nproc          655360
bro hard     nproc          655360
bro soft     nofile         655360
bro hard     nofile         655360
EOF

echo "session required pam_limits.so" >> /etc/pam.d/common-session

echo "session required pam_limits.so" >> /etc/pam.d/common-session-noninteractive

echo "DefaultLimitNOFILE=655360" >> /etc/systemd/system.conf

cat >/etc/sysctl.conf<<EOF
fs.file-max = 655360
net.ipv4.tcp_congestion_control = bbr
net.core.default_qdisc = fq
net.ipv4.tcp_slow_start_after_idle = 0
net.ipv4.tcp_rmem = 8192 262144 536870912
net.ipv4.tcp_wmem = 4096 16384 536870912
net.ipv4.tcp_adv_win_scale = -2
net.ipv4.tcp_notsent_lowat = 131072
EOF

sleep 3 && reboot >/dev/null 2>&1