Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base


How to deal with change requirements in Production environment

What is Change management? The purpose of the Change Management process is to ensure that: „ Standardised methods and procedures are used for efficient and prompt handling of all changes „ All changes to service assets and configuration items are recorded in the Configuration Management System...


RHEL5/6 Interview Questions : DNS

1. There are four types of DNS servers. Name them. 1a. The four types of DNS servers are master, slave, caching-only, and forwarding. 2. What is the difference between an A record and a PTR record? 2a. An A record translates translated hostnames to IP addresses,...


RHEL5/6 Interview Questions : NFS

1. Red Hat Enterprise Linux 6 uses the portmap service alongside the NFS service. True or False? 1a. False. The portmap service was replaced by the rpcbind service in Red Hat Enterprise Linux 6. 2. What is the /var/lib/nfs/etab file used for? 2a. The /var/lib/nfs/etab file is...


RHEL5/6 Interview Questions : SELinux

1. What is the point of using SELinux? 1a. SELinux provides enhanced granular security for the Linux operating system. 2. What are SELinux Booleans? 2a. SELinux Booleans provide restrictions to different aspects of a service. 3. What command can you use to change the context of...


RHEL5/6 Interview Questions : Networking

1. What command displays your current interfaces and IP address? 1a. ifconfig 2. What does ifconfig netmask eth1 do? 2a. This command sets the eth1 interface to have a static IP address of with a netmask of 3. What command can you...

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