zmq error Error: libzmq.so.3

Error: libzmq.so.3: cannot open shared object file: No such file or directory
解决办法：

Install libsodium (dependency of zeromq) and download the latest package from github: https://github.com/jedisct1/libsodium/releases

wget https://github.com/jedisct1/libsodium/releases/download/1.0.3/libsodium-1.0.3.tar.gz
tar -zxvf libsodium-1.0.3.tar.gz

Unzip libsodium-1.0.3.tar.gz and enter the directory in the console to execute

./configure
make
sudo make install

Enter whereis libsodium to see if the installation is successful

Install the latest version of zeromq package address: http://download.zeromq.org/

wget https://archive.org/download/zeromq_3.2.3/zeromq-3.2.3.tar.gz

Unzip zeromq-3.2.3.tar.gz and enter the directory in the console, execute

./configure --without-libsodium
make
sudo make install
sudo ldconfig