How can I check if current web server is NGINX or Apache using bash script?

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I have a Laravel project deployed on Ubuntu VM. I have a script that I am working on right now that to know if the current VM deployed using nginx or Apache programmatically.

I know I can just check using these ps and grep command I will find that out

root@theawsbiz:~# ps -aux | grep apache                                                                                                                 
root      3446  0.0  1.8 544540 37144 ?        Ss   17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3449  0.1  1.9 550388 39796 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3454  0.0  1.0 547336 21532 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3457  0.0  1.8 548196 37864 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3458  0.0  1.0 547320 21428 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3462  0.0  1.7 550008 36264 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3465  0.0  1.8 550408 38160 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3466  0.0  1.9 550400 40512 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3467  0.0  1.0 547320 21416 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3468  0.0  1.7 548228 36236 ?        S    17:02   0:00 /usr/sbin/apache2 -k start                                                             
www-data  3520  0.0  0.9 546872 19964 ?        S    17:06   0:00 /usr/sbin/apache2 -k start                                                             
root      3526  0.0  0.0  14856  1036 pts/1    S+   17:06   0:00 grep --color=auto apache                                                               
root@theawsbiz:~# ps -aux | grep nginx                                                                                                                  
root      3529  0.0  0.0  14856  1092 pts/1    S+   17:06   0:00 grep --color=auto nginx                                                                
root@theawsbiz:~# 

With those result about, I know that this VM is using Apache.

But, I have no idea how to check it via a Bash script. How would one go about and do that? I'm open to any suggestions at this moment.

Since you are trying to achieve this with grep and ps, you could do something like this:

if [[ `ps -acx|grep apache|wc -l` > 0 ]]; then
    echo "VM Configured with Apache"
fi
if [[ `ps -acx|grep nginx|wc -l` > 0 ]]; then
    echo "VM Configured with Nginx"
fi

Bash check if process is running or not on Linux / Unix, pgrep command – Looks through the currently running bash processes on For example, Apache or Nginx web server runs on Linux or Unix-like system to Determine whether a process is running or not using a shell script. The shell and Apache should find the interpreter using the path information on the first line of the script.) The first thing you see written by your program should be a set of HTTP headers, including the Content-Type , followed by a blank line.

ss command can tell you what process is listening on a port.

For example ss -tlnp | grep -E ":80\b" tells you what process is listening on tcp port 80. You can see it's apache or nginx.

How to find out if httpd is running or not via command line?, Most people run their httpd (Apache, Nginx, etc) through an init system. Obviously if you're running a different httpd, script or init system, you're going to have a wget --spider -S "http://localhost" 2>&1 | awk '/HTTP\// {print $2}' 200 So let's talk to an external server (ideally on a completely different connection, in another� For example, Apache or Nginx web server runs on Linux or Unix-like system to display web pages in the background. All running process in the background is called as Daemon. So Apache/Nginx is a class of processes that run continuously in the background, and we say nginx or httpd daemon is running on the server.

  1. You could curl against localhost and grep the headers
$ curl -v api.company.co.ke 2>&1 |grep -i server | awk -F: '{print $2}'

nginx/1.10.3

You can run the command in a subshell and get the output

 ❯ get_server_version=$(curl -v api.company.co.ke 2>&1 |grep -i server | awk -F: '{print $2}') 
 ❯ echo $get_server_version                                                                            
 nginx/1.10.3

Or just run pgrep

 ❯ { pgrep nginx && server_version="nginx"; } || { pgrep apache  && server_version="apache"; } || server_version="unknown"

# On server running nginx
 ❯ echo $server_version
nginx


# On server with neither nginx nor apache
 ❯ echo $server_version
unknown

3 Ways to Check Apache Server Status and Uptime in Linux, Apache is a world's most popular, cross platform HTTP web server that is commonly used in Linux and Unix platforms to deploy and run web� Today, NGINX and NGINX Plus can handle hundreds of thousands of concurrent connections, and power more than 50% of the busiest sites on the web. NGINX as a Web Server. The goal behind NGINX was to create the fastest web server around, and maintaining that excellence is still a central goal of the project.

As curl does not always retrieve the type of webserver, you may use the following code locally on the server :

for webservice in gitlab apache nginx lighttpd; do 
    if `ps aux|grep -v grep|grep -q $webservice`; then 
        echo $webservice; 
        break; 
    fi;
done

Don't do the break statement if you have many values (gitlab is using nginx).

If you have netstat on the server (I think you can use /proc informations instead) :

netstat -naptu |grep :80 |awk '{print $NF}'|cut -d"/" -f2|uniq

For the port 80 or 443 for https.

Best regards

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Comments
  • Cant we do wc -l on grep and see if there are results returned to find whether that process runs?
  • @Sonny wc -l > 1 or > 0 ?
  • Technical yes, `ps -acx|grep apache|wc -l` > 0 , but checking with headers will be much better
  • I think your comment is exactly what I am looking for, you shoud answer it.