How to install icinga2 in centos?

This post will show how to install icinga2 in centos linux server to monitor different servers. Icinga 2 is an open source monitoring system which checks the availability of your network resources, notifies users of outages, and generates performance data for reporting. Add Icinga repository RHEL/CentOS 7 # yum install https://packages.icinga.com/epel/icinga-rpm-release-7-latest.noarch.rpm RHEL/CentOS 6 # yum […]

vsftpd Error: 500 Illegal PORT command. ftp: bind: Address already in use

ftp 127.0.0.1 21 Connected to 127.0.0.1. 220 (vsFTPd 2.2.2) Name (127.0.0.1:prakash): prakash 331 Please specify the password. Password: 230 Login successful. Remote system type is UNIX. Using binary mode to transfer files. ftp> ls 500 Illegal PORT command. ftp: bind: Address already in use To solve this, Method #1. Change mode to passive by typing […]