How To Measure Disk Performance IOPS With Fio in Linux The Fio is one of the best disk performance and benchmarking utility for Linux. The Fio is a free and open source. IOPS (Input/Output Operations Per Second) is a… Continue Reading
Daloradius Installation on CentOS 7 FreeRADIUS, the open source implementation of RADIUS, an IETF protocol for AAA (Authorisation, Authentication, and Accounting). Disable SELinux # setenforce 0 Edit file /etc/selinux/config and set: SELINUX=disabled Install MariaDB/MySQL Edit MariaDB.repo file: # vi… Continue Reading
CentOS Firewalld. How To CentOS firewalld provides a dynamically managed firewall with support for network/firewall zones to define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings and for ethernet bridges and has… Continue Reading
Zimbra Fail2ban Setup How to install and configure Fail2ban for Zimbra mail server on CentOS. Fail2Ban is an intrusion prevention software framework that protects computer servers from brute-force attacks. Install Fail2ban on CentOS 7: Ensure your system is up… 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 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
How do I scan for viruses with ClamAV? At first you have to update the virus definitions with: sudo freshclam Then you can scan for viruses. clamscan OPTIONS File/Folder If necessary start with root permissions: sudo clamscan. Examples: To check… 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