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Category: Configurations (Linux)

mynetworks issue!

Rumi, October 28, 2008

Need to allow the entire IPv-4 in postfix set-up? You should be crazy to do that 🙂 Anyway, here goes the net mask calculaitons,

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Postfix 2.2.3 main.cf configured sample file

Rumi, October 28, 2008

queue_directory = /var/spool/postfix command_directory = /usr/sbin daemon_directory = /usr/libexec/postfix mail_owner = postfix myhostname = server.domain.com mydomain = domain.com myorigin = $mydomain inet_interfaces = all mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain, mail. $mydomain, www.$mydomain, ftp.$mydomain local_recipient_maps = unknown_local_recipient_reject_code = 550 mynetworks = 192.168.1.0/24 127.0.0.0/8 #relay_domains = $mydestination #relayhost = $mydomain #relayhost…

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Search for a File in Linux

Rumi, October 27, 2008October 27, 2008

Locating any file on a linux operating system can be done quickly from the command line. Step 1 Index your file system with updatedb. This makes a list of files so that later searches won’t have to look in the entire span of directories each time.

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URL Redirect PHP script for Horde

Rumi, October 12, 2008November 6, 2008

I nearly got mad implementing horde in virtualmin. Though this section will not tell how the Horde was setup. Anyways, HORDE needs to work under /horde framework. I know this can be fixed up in registry.php file and can be used as /groupware or something.

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Creating Domain Parking Page in Virtualmin

Rumi, October 4, 2008

Well, who ever set up virtualmin must be sick in seeing the default CentOS Apache page! I bet you do- since this it concerns to other hosted domains and virtual servers!

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DNS Slave Auto-Configuration Quickstart

Rumi, September 23, 2008

  Virtualmin can automatically manage any number of DNS slave servers for you. Once configured, it will create slave zones on other servers and configure them to automatically update when changes are made on your Virtualmin server. For this to work, you need Virtualmin on your primary server and Webmin…

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Set up the firewall to listen MySQL on port 3306

Rumi, September 6, 2008

Just a small tweaking comnand that allows MySQL server on a linux server to open & listen to port 3306 for remote connectivity- [root@linux root]# iptables -I INPUT -p tcp –dport 3306 -j ACCEPT

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How to setup as DNS client / name server IP address

Rumi, August 26, 2008August 26, 2008

Many new Linux user finds it difficult to setup / modify new name server address (NS1 / NS2). Local name resolution is done via /etc/hosts file. If you have small network then use /etc/hosts file. DNS (domain name service is accountable for associating domain names with ip address, for example…

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Dovecot Setup using webmin

Rumi, July 10, 2008July 10, 2008

Step 1 Networking and Protocols In “Server mail protocols”-  select IMAP and POP3 You can also select IMAP (SSL) and POP3 (SSL) if you plan to server through SSL Step 2 Mail Files I decided not to store mail in the default location which is /var/mail In my earlier postfix…

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Linux CHMOD Change user & group ownership

Rumi, June 21, 2008January 7, 2011

Learn how to change the owner and group ownership of files and directories with the chown and chgrp commands. Caution: you need to do this whiled logged in as 'root' user. In order to set the ownership of a directory and all the files in that directory, you'll need the…

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Myself…

Hi, I am Hasan T. Emdad Rumi, an IT Project Manager & Consultant, Virtualization & Cloud Savvyfrom Dhaka, Bangladesh. I have prior experience in managing numerous local and international projects in the area of Telco VAS & NMC, National Data Center & PKI Naitonal Root and CA Infrastructure. Also engaged with several Offshore Software Development Team.

Worked with Orascom Telecom-Banglalink, Network Elites as VAS partner, BTRC, BTT (Turkey) , Mango Teleservices Limited and Access to Informaiton (A2I-UNDP)

Currently working at Oracle Corporation as Principal Technology Solution and Cloud Architect.

You can reach me [h.t.emdad at gmail.com] and I will be delighted to exchange my views.

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Apache Bind Cacti CentOS CentOS 6 CentOS 7 Debain Debian Debian 10 Debian 11 Debian 12 DKIM Docker endian icinga iptables Jitsi LAMP Letsencrypt Linux Munin MySQL Nagios Nextcloud NFS nginx pfsense php Postfix powerdns Proxmox RDP squid SSH SSL Ubuntu Ubuntu 16 Ubuntu 18 Ubuntu 20 Varnish virtualbox vpn Webmin XCP-NG zimbra

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