How to check apache installed in ubuntu

 

To check whether Apache is installed on an Ubuntu system, you can use the following methods:

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1. Check Apache Service Status

Run the following command to check if the Apache service exists and its status:

sudo systemctl status apache2

• If Apache is installed, you will see details like its status (active or inactive).
• If Apache is not installed, you will see an error message stating that the service does not exist.

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2. Check for Apache Package

Use the dpkg or apt command to check if Apache is installed as a package:

dpkg -l | grep apache2

OR

apt list --installed | grep apache2

• If Apache is installed, the output will show the Apache package (e.g., apache2).

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3. Check Apache Executable

You can check if Apache's binary exists in the system path:

which apache2

• If Apache is installed, this command will show the path to the apache2 binary (e.g., /usr/sbin/apache2).

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4. Check HTTP Port 80

If Apache is running, it will typically listen on port 80. Check this with:

sudo lsof -i :80

• If Apache is running, you will see an entry like apache2 listening on port 80.

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5. Check Apache Version

If Apache is installed, you can check its version directly:

apache2 -v

• If Apache is installed, it will display the version information.

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6. Check for Apache Default Page

If Apache is running, test it by accessing the default web page:

1. Open a web browser.

2. Enter your server's IP address or localhost:

   http://localhost
   

   OR

   http://<server-ip-address>
   

3. If Apache is running, you will see the Apache2 Ubuntu Default Page.

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Summary

If Apache is not installed, install it with:

sudo apt update
sudo apt install apache2 -y

Let me know if you need help installing or configuring Apache! 🚀