-bash: nginx: command not found

nano /etc/profile       

在最后加入

export PATH=/usr/local/php/bin:/usr/local/nginx/sbin:/usr/local/mariadb/bin:$PATH

建立一个软连接

ln -s /usr/local/nginx/sbin/nginx  /usr/local/bin

参考链接：https://blog.csdn.net/Hjingeng/article/details/105264814