0 简单版
apt install shadowsocks-libev
nohup ss-server -s 0.0.0.0 -p 65534 -l 8388 -k 123456 -m chacha20-ietf-poly1305 &
服务端口 65534， 本地端口 8388，密码 123456，加密方式 chacha20-ietf-poly1305
1 安装
Ubuntu 下直接 apt 安装，注意权限不够则命令前加 sudo：
apt install shadowsocks-libev
其他系统没有包可以手动编译
2 配置文件修改
2.1 服务配置
修改服务配置文件:
vim /etc/shadowsocks-libev/config.json
复制粘贴到文件中
{
"server":"0.0.0.0",
"server_port":65534,
"local_port":1080,
"password":"123456",
"timeout":60,
"method":"chacha20-ietf-poly1305",
"fast_open": true
}
2.2 启动文件
创建 Shadowsocks-libev.service 配置文件用于 systemctl 控制：
vim /etc/systemd/system/shadowsocks-libev.service
复制粘贴到文件中
[Unit]
Description=Shadowsocks-libev Server
After=network.target
[Service]
Type=simple
ExecStartPre=/bin/sh -c 'ulimit -n 51200'
ExecStart=/usr/local/bin/ss-server -c /etc/shadowsocks-libev/config.json -u
Restart=on-abort
[Install]
WantedBy=multi-user.target
2.3 优化吞吐量
新建配置文件：
vim /etc/sysctl.d/local.conf
复制粘贴：
#max open files
fs.file-max = 51200
#max read buffer
net.core.rmem_max = 67108864
#max write buffer
net.core.wmem_max = 67108864
#default read buffer
net.core.rmem_default = 65536
#default write buffer
net.core.wmem_default = 65536
#max processor input queue
net.core.netdev_max_backlog = 4096
#max backlog
net.core.somaxconn = 4096
#resist SYN flood attacks
net.ipv4.tcp_syncookies = 1
#reuse timewait sockets when safe
net.ipv4.tcp_tw_reuse = 1
#turn off fast timewait sockets recycling
net.ipv4.tcp_tw_recycle = 0
#short FIN timeout
net.ipv4.tcp_fin_timeout = 30
#short keepalive time
net.ipv4.tcp_keepalive_time = 1200
#outbound port range
net.ipv4.ip_local_port_range = 10000 65000
#max SYN backlog
net.ipv4.tcp_max_syn_backlog = 4096
#max timewait sockets held by system simultaneously
net.ipv4.tcp_max_tw_buckets = 5000
#turn on TCP Fast Open on both client and server side
net.ipv4.tcp_fastopen = 3
#TCP receive buffer
net.ipv4.tcp_rmem = 4096 87380 67108864
#TCP write buffer
net.ipv4.tcp_wmem = 4096 65536 67108864
#turn on path MTU discovery
net.ipv4.tcp_mtu_probing = 1
net.ipv4.tcp_congestion_control = bbr
运行：
sysctl --system
编辑配置文件 limits.conf
vim /etc/security/limits.conf
在文件结尾添加两行：
* soft nofile 51200
* hard nofile 51200
2.4 开启 Google BBR
运行 lsmod | grep bbr，如果结果中没有 tcp_bbr，则先运行：
modprobe tcp_bbr
echo "tcp_bbr" >> /etc/modules-load.d/modules.conf
运行：
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
运行：
sysctl -p
保存生效。运行：
sysctl net.ipv4.tcp_available_congestion_control
sysctl net.ipv4.tcp_congestion_control
若均有 bbr，则开启 BBR 成功。
3 启动
启动 Shadowsocks：
systemctl start shadowsocks-libev
设置开机启动
systemctl enable shadowsocks-libev
