Unix provides a service called cron that runs programs repeatedly on a fixed schedule. Most experienced administrators consider cron to be vital to the system because it can perform automatic system maintenance.
Configure Bonding Device on Red Hat Enterprise Linux 6
Introduction
Bonding (or channel bonding) is a technology enabled by the Linux kernel and Red Hat Enterprise Linux, that allows administrators to combine two or more network interfaces to form a single, logical “bonded” interface
Telnet not obeying the per_source limit
Issue
We are trying to limit the telnet connection from any individual IP address to 10 in RHEL. However this is not working and it seems that each source can have unlimited connections. Our configuration is set to limit the connections, via the per_source value in /etc/xinetd.conf to 10 as shown below:
How to patch OpenSSL’s Heartbleed Vulnerability
How to patch OpenSSL’s Heartbleed Vulnerability
First you need to understand that not all version of OpenSSL are vulnerable.
Below are the version of OpenSSL that are affected by this bug.
Understanding Linux file Permissions
How to install FTP in Windows Server 2012
Log into your dedicated or cloud server as administrator.
Click on: Start
Click on: Server Manager
What is “crashkernel=X@Y” in /etc/grub.conf
“crashkernel=X@Y” is a kernel parameter for Kdump.
Kdump requires some memory reservation for the second kernel(capture kernel).
When kdump is enabled, (physical memory – X) will be allocated.
How to Configure RHEL automatically Reboot after a kernel panic
If we want the system to automatically reboot after a timed delay when experience the kernel panics and system is inaccessible on Red Hat Enterprise Linux 4, 5, and 6.
Check if ‘rhnsd’ is Running on the Server
rhnsd is the Red Hat Network Daemon. Every other hour, it sends a request to Red Hat Network (RHN) asking for any notifications or updates and works in coordination with Red Hat Network to schedule automated tasks.
How to enable or disable automatic Errata Updates
Red Hat Network (RHN) can be configured to provide automatic updates to specific systems via the website. Once a system is configured to be automatically updated, it will download and install all relevant errata when it connects to RHN. The system will not install packages which are listed in that system’s package skip list.
