Securing NTP with iptables
Like the DHCP server, NTP requires only firewall rules to operate (no SELinux configuration is necessary).
Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base
How to change a volume usage type from gen to fsgen in VERITAS STORAGE FOUNDATION?
It has been recommended by VERITAS to have fsgen as Volume usage type for volume which are going to be used for Filesystem creation and mounts. VERITAS claim that it becomes necessary to change the volume usage type to fsgen so that file systems will synch...
How is a Docker container superior than a Virtual Machine
Virtualization is among the one the most useful & most used technologies in IT world. With the help virtualization, we can create virtual machines which are loaded with full OS capabilities with their own memory management, just like any regular OS on a dedicated physical server....
VCS 6.1 – How to view or delete VCS alerts using haalert?
The haalert command line utility enables users to view and delete VCS alerts.
Scripting : Adding Static routes to remote Linux systems – Video
In our previous example we have discussed about a scenario , in which we have copied a script to each host and then we executed the script remotely using another calling script from the centralized host ( which is having publick key – password less...
Lun Provisioning in OpenFiler for shared storage
The best part of OpenFiler is its “Web Based Administration” which makes it even more user friendly. Below are the complete steps to provision new Luns in OpenFiler. “http://mentorsup.com/blog/2016/02/installation-of-openfiler-on-vmware-workstation-for-shared-storage-in-unix/” :Let me add two 1 GB disks (for new LUN creation) to OpenFiler VM which we have...
Redhat Linux : Collect System Diagnosis report for the Support Call purpose
Red Hat Enterprise Linux 4.5 and previous On a default installation the package Sysreport should be already installed. If not you need to install the package “sysreport-.rpm” with the following command # rpm -ivh sysreport-.rpm or, if your system is registered at the Red Hat Network...
NIS and Netgroups : Restricting logins on a machine using compat mode and netgroups
There’s no local files implementation of netgroups. Netgroups are used to group machines or users together in order to make certain sysadmin tasks easier. A standard netgroup triple reads as follows: (hostname, username, domainname)
RHEL5/6 Interview Questions : System Security
1. All services in Red Hat can use TCP Wrappers. True or False? 1a. False. A service needs to have support for TCP Wrappers to be able to use it. 2. The firewall service is disabled by default. True or False? 2a. False. The firewall service...
