To delete all email in the queue from a specific email address run this command as root: postqueue -p | tail -n +2 | awk 'BEGIN { RS = "" } /username@example\.com/ { print $1 }' | tr -d '*!' … Continue reading →

Go to the directory and run the following command: find . ! -newermt 2013-11-22 ! -type d -delete

Zabbix requires Apache-Mysql-PHP stack to be installed in order to run. You can follow this previous post. Let’s download and install Zabbix rpm -ivh http://repo.zabbix.com/zabbix/2.4/rhel/7/x86_64/zabbix-release-2.4-1.el7.noarch.rpm yum install zabbix-server-mysql zabbix-web-mysql zabbix-agent We have to edit timezone in /etc/httpd/conf.d/zabbix php_value date.timezone Europe/Athens … Continue reading →

Install Mysql (MariaDB) and set password yum -y install mariadb-server mariadb systemctl start mariadb.service systemctl enable mariadb.service mysql_secure_installation Install Apache yum -y install httpd systemctl start httpd.service systemctl enable httpd.service Open ports in firewall firewall-cmd –permanent –zone=public –add-service=http firewall-cmd –permanent … Continue reading →

Here I am assuming that we started with the minimal installation of Centos 7. Let’s install some useful packages yum install wget vim mc ntp net-tools Now let’s configure the timezone and start the ntp service timedatectl list-timezones | grep … Continue reading →