使用shell脚本安装nginx web服务器

Question

I want to automate the installation of nginx web service in such a way that if nginx is already present it will get installed at other location ex: /usr/local/nginx.

#!/bin/bash
echo "Beginning installation of nginx web server"
if ! which nginx > /dev/null 2>&1; then
    echo "Nginx is not installed"
else
    echo "Installing nginx"
    yum install nginx -y
    
    #check if nginx services are up
    service nginx start
fi

I am new to shell script and tried above approach, however I am unable to execute command in else block. Help will be really appreciated.

Answer 1

I think i understand what you wanted to do but logic in you code is not the best, so here is snip from one of my first bash scripts where i did something similar:

  read INP
  if [ $INP -eq 1 ]
  then
    if command -v nginx
    then
      systemctl status nginx
      back
    else
      error
      read INP
      if [ $INP == y ]
      then
        sudo apt install nginx
      else
        back
      fi
    fi
  fi

Btw this is for Debian based distros, so you can change apt for yum, pacman, etc. package manager. And just to be clear, back and error are functions i created.