安装python和ss
yum install python-setuptools && easy_install pip
pip install shadowsocks
配置 Shadowsocks 配置文件
vi /etc/shadowsocks.json
{
"server": "my_server_ip", // 这里输入本机的 IP 地址
"server_port": 8388, // 为了安全，可修改为大于 1024 的数字
"local_address": "127.0.0.1",
"local_port": 1080, // 为了安全，可修改为大于 1024 的数字
"password": "mypassword", // 设置一个密码
"timeout": 300,
"method": "aes-256-cfb",
"fast_open": false
}
启动并永久运行 Shadowsocks 服务端功能
一句命令即可启动并永久运行：nohup ssserver -c /etc/shadowsocks.json -d start &
ssserver是SS的服务端命令。-c表示以配置文件的方式运行SS，/etc/shadowsocks.json则是配置文件的路径。-d表示在后台运行，这样允许用户进行其他操作。start就是启动。nohup以及最后的&是让SS服务端一直运行，并把运行日志输出到当前用户主目录下的nohup.out文件中。
停止 SS 服务端
ssserver -c /etc/shadowsocks.json -d stop
无需
nohup和&，把start换成stop
优化 Shadowsocks 性能
按照 SS 官方 Wiki，有如下优化策略：
- 创建
local.conf配置文件：vim /etc/sysctl.d/local.conf - 按键盘
i，输入以下内容
# 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
# for high-latency network
net.ipv4.tcp_congestion_control = hybla
# for low-latency network, use cubic instead
# net.ipv4.tcp_congestion_control = cubic
退出并保存配置文件：按键盘 Esc 退出编辑，英文输入法状态下，输入 :wq
使配置生效：sysctl --system
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