![]() Access logs help you see what’s being requested and where it’s coming from. You can also use them for security reasons because they store all the requests sent to the server. Access logs are commonly used for monitoring a website’s performance. Access logs are lists of files your users (or even bots) are requesting from your website and all the processed files. Just like accessing error logs, you can also monitor access logs by running the same command mentioned previously. If this flag is left out, you might not be able to get every detail about the log file. This flag makes sure the tail command outputs additional data from the log file. You may have noted we’re passing -f flag in the command. You can use these errors to monitor the operations on your website and better troubleshoot issues occurring on the web server. The tail command tells the machine to read the file and display the results on the terminal. When you run this command, you’ll be able to view the errors in the terminal as they occur in real time. You can then log out the errors from the error log file by writing the following command: sudo tail -f /var/log/apache2/error.log. On a Linux server, you can access Apache error logs from var/log/apache2/error.log. For example, you can access Apache logs from the Apache Unix/Linux server by looking in the following directories: You can access Apache logs from var/log/log_type. These commands are completely free and ready to use. And although Unix commands won’t give you a graphical representation of the logs, you’ll be able to get the desired results. Even though writing Unix commands might not be easy, using this approach does the job. Many developers and systems admins use this method. One approach to monitoring your Apache logs from the server is by using Unix command-line tools. ![]() If you don’t have a basic understanding of Linux, in this post, I’ll give you some options to make it easier. Some of them are tricky, and you’ll need some basic understanding of working with a Linux-based environment. There are many ways you can monitor Apache logs. You can use these logs to optimize your website and improve its performance, because users love fast websites and hate slow ones. Knowing your website traffic can be helpful, as it gives you information to help you decide whether to scale your website hosting resources. One use case can be to check traffic volume. When you look at the error logs, the error message logs can help make troubleshooting your web application easier. The information you get from the Apache web server can help you improve your website. Apache plays an important role by giving you necessary information about your web operations from the server-information such as traffic volume, errors, and server performance metrics. sudo nano /usr/local/nagios/etc/objects/contacts.cfgĬhange the email address field to receive the alerts.Apache logs are important to any software developer or anyone who has a web application. These default configuration files should work fine.Įdit the /usr/local/nagios/etc/objects/contacts.cfg file and change the email address associated with the nagiosadmin contact definition to the email address you would like to use for receiving alert notification. Nagios places configuration files in the /usr/local/nagios/etc directory. configure -with-nagios-group=nagios -with-command-group=nagcmd -with-httpd_conf=/etc/apache2/sites-enabled/ cd /tmpĮxecute below commands to compile the Nagios from the source code. Official website to download the latest version of Nagios core. sudo useradd nagiosĭownload the Nagios core (v4.4.5) tarball using the terminal with wget command. ![]() Then add the nagios and apache user ( www-data) to the part of the nagcmd group that allows the external commands to be executed through the Nagios web interface. Sudo apt install -y build-essential apache2 php openssl perl make php-gd libgd-dev libapache2-mod-php libperl-dev libssl-dev daemon wget apache2-utils unzipĬreate a user and group for Nagios. ![]() Install the below packages for compiling Nagios. So, we need to compile it from the source. Nagios can also monitor routers and other network devices. Nagios, you can monitor basic services such as HTTP, FTP, SSH, SMTP, etc., and attributes such as CPU load, memory, disk usage, logged in users, running processes, etc. Monitoring tools for monitoring the services and applications that run on Windows and Linux operating systems. Nagios is one of the most widely used open-source
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