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Category: Configurations (Linux)

Set Hostname in Centos 7

Rumi, May 11, 2019

CentOS 7 only allows Fully Qualified Domain Names (FQDN’s). Acceptable values include lower-case letters a to z, numbers 0 to 9, the period, and the hyphen, and between 2 and 63 characters. At the console, type: hostnamectl set-hostname my.new-hostname.server NOTE: Replace my.new-hostname.server with your chosen hostname. Check the Hostname hostnamectl

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SOLVED Zimbra 8.6 HTTP ERROR 404 Problem accessing /public/error.jsp. Reason: /public/error.jsp

Rumi, May 10, 2019

Do a quick search under the usual jetty folders: find /opt/zimbra/jetty/ -type f -name *jsp -mtime -30 If you find files like: /opt/zimbra/jetty/webapps/zimbra/js/zimbra/csfe/XZimbra.jsp /opt/zimbra/jetty/webapps/zimbra/public/Ajax.jsp you’re actually hacked. Unlike the previous “zmcat” and “dblaunchs” that actually exploit the vuln and load some sh*t this looks like a bad childish attack. It…

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SOLVED Debian Wheezy Letsencrypt error /opt/eff.org/certbot/venv/bin/python: No module named pip.__main__; ‘pip’ is a package and cannot be directly executed

Rumi, May 10, 2019

My case and solution: Debian 7.11 wheezy python2.7 python-pip NOT installed My steps: #ln -fs /usr/lib/python2.7/plat-x86_64-linux-gnu/_sysconfigdata_nd.py /usr/lib/python2.7/ #wget https://raw.githubusercontent.com/certbot/certbot/75499277be6699fd5a9b884837546391950a3ec9/certbot-auto #chmod +x ./certbot-auto #certbot-auto renew –no-self-upgrade it download some files and works fine. Src: https://github.com/certbot/certbot/issues/6824

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Fixing Rainloop Can’t get message list error

Rumi, April 29, 2019

For large mailbox when you have some mailbox having more than 100k mails in inbox, for those account you are getting error “Can’t get message list”. Here I got my fix, however can’t guarantee it works for you as well. My Rainloop version is 1.11.3. Following settings might help to…

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Setup a Site to Site IPsec VPN With Strongswan and PreShared Key Authentication

Rumi, March 25, 2019March 25, 2019

Today we will setup a Site to Site ipsec VPN with Strongswan, which will be configured with PreShared Key Authentication. After our tunnels are established, we will be able to reach the private ips over the vpn tunnels. Get the Dependencies: Update your repository indexes and install strongswan: $ apt…

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Zimbra authentication without domain

Rumi, March 20, 2019

In the admin interface go to Global Settings -> General Information -> Default domain and enter the name of your domain. Users in that domain can now login without the @domain part.

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Install LAMP on Centos 7 with PHP 5.x/7.0/7.1/7.2

Rumi, March 10, 2019

In this tutorial, I use the hostname server1.example.com with the IP p 192.168.1.100. These settings might differ for you, so you have to replace them where appropriate. I will add the EPEL repo here to install latest phpMyAdmin as follows: rpm –import /etc/pki/rpm-gpg/RPM-GPG-KEY* yum -y install epel-release To edit files…

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Endian Community (3.x)- network configuration using CLI- Netwizard

Rumi, February 20, 2019

After you login in you Endian Appliance, simply issue the following command: root@endian # netwizard You will be asked a couple of questions. If the network has already been configured, the current values are shown: simply press Enter if you want to keep that value. The snippet below shows some…

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Endian Community (2.5.1)- Change the green IP address from console

Rumi, February 18, 2019

Management URL: https://192.168.0.15:10443 Green IP:       192.168.0.15/24 —————– 0) Shell 1) Reboot 2) Change Root Password 3) Change Admin Password 4) Restore Factory Defaults Choice: 0[endian]: login root’s password: Welcome to Endian Firewall Appliance release 2.5-0 (Deployset #0) [endian] root: bash

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Install Percona XtraDB Cluster for MySQL 5.7 on Debian 8

Rumi, February 18, 2019

First of all, why we choose three nodes and not only two? In any cluster, the number of nodes should be odd, so in the case of disconnection of a node, we assume that the highest group of servers has the fresh data, and should be replicated to the down node…

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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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