problem:

　　After restarting the virtual machine, restarting nginx again will report an error: open() “/var/run/nginx/nginx.pid” failed (2: No such file or directory)

Solution:

　　(1) Enter the cd /usr/local/nginx/conf/ directory and edit the configuration file nginx.conf;

　　(2) There is a comment in the configuration file: #pid logs/nginx.pid;

　(3) Release the comment and modify it to: pid /usr/local/nginx/logs/nginx.pid;

　　(4) Create a logs directory under the /usr/local/nginx directory: mkdir /usr/local/nginx/logs

　　(5) Start nginx service: /usr/local/nginx/sbin/nginx