Technological – Page 6

June 30, 2016June 30, 2016Active Directory, Windows Technologies

Fix: The following Domain Controller could not be contacted – A local error has occurred.

Scenario: You attempt to launch the Active Directory Management Console – Active Directory Domains and Trusts, on your domain controller in a different AD site, you’ll be notified with the below error: —————————Active Directory Domain Services————————— The following Domain Controller could not be contacted: USA-DC01.mylab.lan. A local error has occurred. —————————OK————————— Fix: If your current domain controller (in the different site) is running with different time zone than that of the primary domain controller that you are trying to connect to, then change the time zone on your domain controller to match with the time zone of the primary […]

June 23, 2016Mobile

Choosing right capacity External Memory Card for your devices and use cases

This article helps you build understanding on which memory card to choose among currently available MicroSD, MicroSDHC and MicroSDXC. Confirm Compatibility Before inserting your SD memory card, confirm the device is compatible with the SD standard by locating an SD logo on the device or referring to the device’s user manual or manufacturer information. The differences between the three formats are significant: microSD: Has a capacity up to 2 GB, and can be used in any microSD slot. microSDHC: Has a capacity of more than 2 GB and up to 32 GB, and can be used in hardware that supports […]

June 22, 2016October 6, 2016Networking, Unix Technologies

Setup or Migrate Postfix SMTP relay server on CentOS 6.5

Scenario: You have a External SMTP relay host configured on older and physical Linux box which you would like to migrate to CentOS host in a virtualized environment. The older Linux box running on Ubuntu 6.06 + Postfix 2.2.10. You want to migrate it to a virtual machine running CentOS 6.5 + Postfix 2.6.6. OS and Postfix Version details of existing server: root@NSHost1:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 6.06.2 LTS Release: 6.06 Codename: dapper root@NSHost1:~# root@NSHost1:~# postconf -d | grep mail_version mail_version = 2.2.10 root@NSHost1:~# OS and Postfix Version details of new server: […]