参考文档

Install the Command Line Client

sudo yum install python-setuptools
sudo easy_install pip
sudo pip install shadowsocks

Create a Configuration File

we will create a configuration file under /etc/

 sudo vi /etc/shadowsocks.json

Put the following text in the file. Replace server-ip with your actual IP and set a password.

{
"server":"server-ip",
"server_port":8000,
"local_address": "127.0.0.1",
"local_port":1080,
"password":"your-password",
"timeout":600,
"method":"aes-256-cfb"
}

Save and close the file. Next start the client using command line

sslocal -c /etc/shadowsocks.json

To run in the background

sudo sslocal -c /etc/shadowsocks.json -d start

Auto Start the Client on System Boot

Edit /etc/rc.local file

sudo vi /etc/rc.local
`

Put the following line above the exit 0 line:

sudo sslocal -c /etc/shadowsocks.json -d start

Save and close the file. Next time you start your computer, shadowsocks client will automatically start and connect to your shadowsocks server.

Check if It Works

After you rebooted your computer, enter the following command in terminal:

sudo systemctl status rc-local.service

If your sslocal command works then you will get this ouput:

● rc-local.service - /etc/rc.local Compatibility
Loaded: loaded (/etc/systemd/system/rc-local.service; enabled; vendor preset: enabled)
Active: active (running) since Fri 2015-11-27 03:19:25 CST; 2min 39s ago
Process: 881 ExecStart=/etc/rc.local start (code=exited, status=0/SUCCESS)
CGroup: /system.slice/rc-local.service
├─ 887 watch -n 60 su matrix -c ibam
└─1112 /usr/bin/python /usr/local/bin/sslocal -c /etc/shadowsocks....

As you can see from the last line, the sslocal command created a process whose pid is 1112 on my machine. It means shadowsocks client is running smoothly. And of course you can tell your browser to connect through your shadowsocks client to see if everything goes well.

If for some reason your /etc/rc.local script won’t run, then check the following post to find the solution.
How to enable /etc/rc.local with Systemd