Setup FQDN for Ubuntu 18.04 LTS The Fully Qualified Domain Name (FQDN) of the system is the name that the resolver returns for the host name. You can check the FQDN using commend: hostname –fqdn or hostname -f. The domain name… Continue Reading
Install Apache Tomcat on Ubuntu 18.04 LTS Apache Tomcat is an open-source software implementation of the Java Servlet and Java Server Pages technologies. With this guide, you’ll run applications within Tomcat using the OpenJDK implementation of the Java development environment.… Continue Reading
How to install Phoronix test suite on CentOS The Phoronix Test Suite is Open-Source Automated testing and benchmarking platform. The Phoronix Test Suite has access to more than 450 test profiles and over 100 test suites via OpenBenchmarking.org. First install… Continue Reading
How To Setup SSH Public Key Authentication On Linux Why using SSH Public Key Authentication On Linux? Public Key Authentication is much more secure than SSH password authentication. In case if your server allows password authentication, remote attackers will try… Continue Reading
Second Network Card Not Being Detected You have dual onboard NIC and ifconfig displays only one interface (eno1) in Ubuntu. eno1 is embedded (onboard) Network Interface Card. Make sure Linux able “see” your networking hardware sudo lspci | grep Ether… Continue Reading
How To Install and Configure Zabbix Agent on Linux – Red Hat Enterprise Linux / CentOS and Debian / Ubuntu Zabbix server requires to install Zabbix Agent on remote Windows and Linux systems. For collecting information and and provide to… Continue Reading
Zimbra Mail Server is sending Spam How to find SMTP Auth usernames (users) who authenticated on the SMTP port to send a bulk emails. The following command will return list of authenticated users on the SMTP port to send an… Continue Reading
Nmap (“Network Mapper”) is a free and open source (license) utility for network discovery and security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or… Continue Reading
How To Monitor Disk Load in Linux iostat utility will help measure and monitor hard drive load: # iostat -dx /dev/sda 5 As result you can see output:
How To Create a Sudo User CentOS Login into your server as root. If you already have user you can use usermod command ro add the user to the wheel group: # usermod -aG wheel username For testing sudo for that… Continue Reading