Install Dependencies

yum install
wget python27 gcc swig openssl-devel redhat-rpm-config python2-devel tar make git

Note that on CentOS 8, install by yum with one calling may not work as expected. Please double check to make sure you have everything listed installed.

Install pip and something should be installed by pip

wget https://bootstrap.pypa.io/get-pip.py
python2 get-pip.py
pip install pyparsing
pip install cymysql
pip install m2crypto

Optional: Install libsodium (To support CHACHA20 encryption)

# Download, Unzip, Compile and Install
wget -N --no-check-certificate https://download.libsodium.org/libsodium/releases/LATEST.tar.gz 
tar zvxf LATEST.tar.gz 
cd libsodium-* 
./configure 
make && make install
# Add link to system library
echo "/usr/local/lib" >> /etc/ld.so.conf
ldconfig 
# Expect no output info. Otherwise something went wrong

Installation and configuration of Shadowsocks-manyuser

Thanks to Clowwindy, Mengskysama and all the other developers for making this project possible.

git clone -b manyuser https://github.com/mengskysama/shadowsocks-rm.git
cd shadowsocks-rm/shadowsocks/ # Enter the directory
vi config.py # Edit configuration file
Run Shadowsocks-manyuser
python2 servers.py # In the directory, call by hand. 
/usr/bin/python2 {DIRECTORY}/shadowsocks-rm/shadowsocks/servers.py # Full path might be needed

Also, glad to see CentOS 8.