Firewall CentOS 7 now uses FirewallD, which is not bad, but I don’t think it’s mature enough. So to just disable it and get back to the classic iptables service there are some steps: systemctl stop firewalld systemctl disable firewalld […]
On a typical Linux mail server mail is stored on the disk either using one big file in /var/mai/%user either in one Maildir in users’s home folder. This Maildir usually contains one small file for each mail stored on your […]
This mail server will use Postfix as a MTA, Dovecot as an LDA, IMAP/POP Server, and MariaDB(MySQL) to store user login information. It will also use PostfixAdmin web interface to manage domain, users and mail administrators information. HTTPD To run […]
First thing is to chose the Distro. For this install I chose CentOS 7, basically a RHEL clone, version 7 is the latest one. Download You can download the minimal install ISO from here. Then you need to burn this […]
I run this website on a physical server that i rent. Recently I wanted to run on the same server a virtual machine, with a different OS, with a public IP address(I use KVM for that, as there’s nothing to […]
Well, on a high-traffic mail server we need to follow the server log, to look for possible issues. The “tail -f” method might just not be as good as we would want, text is going up too fast and web […]
Let’s say you’re on a news website for instance bbc.co.uk, that you read a lot, but each time you look on the website you can’t tell if you already visited that portion of the website or not. Let’s say you […]
On Debian/Ubuntu we would need to search for installed kernel packages, something like this: root@server:~# dpkg –list |grep linux-image ii linux-image-3.2.0-23-generic 3.2.0-23.36 Linux kernel image for version 3.2.0 on 64 bit x86 SMP ii linux-image-3.2.0-56-generic 3.2.0-56.86 Linux kernel image for […]
Well, in EL6 when we wanted to change Apache’s MPMs we would edit /etc/sysconfig/httpd and set the HTTPD variable with the binary needed.It looks something like: HTTPD=/usr/sbin/httpd.worker To see the available options we could type the following command: [root@server ~]# […]
First of all we need to deactivate FirewallD systemctl disable firewalld.service Then we install the package called iptables-services yum install iptables-services edit /etc/sysconfig/iptables then start classic iptables and make it load on each reboot systemctl start iptables.service systemctl enable iptables