Category: Linux Admin

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RHEL7 – How to disable transparent hugepages (THP)

Method 1: Create a customized tuned profile with disabled THP Step 1: Initially, we should create a customized version of the currently running profile. The customized version will disable THP. Find out which profile is active, create a copy. In the following example we currently use the...

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Creating Centralized Crash Analysis Server for Red hat Enterprise Linux Environment

Case Study : In our RedHat Enterprise Linux environment, transferring large vmcore files to external sites for support purpose can be extremely time consuming and/or not realistic.  And  at the same time  it is not feasible  to install the kernel-debuginfo and crash utility packages locally on...

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Configuring Kdump to troubleshoot kernel crashes, hangs, or reboots in RHEL5/RHEL6/RHEL7

  How Kdump works? Using the kdump service and the kexec command, you can ensure faster boot up and creation of reliable kernel (vmcores) for diagnostic purposes. First of all let us understand these two basic components: • kexec:  The kexec command is a fast boot mechanism...

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You all made me win , Thank you

You all know that we have recently announced  Solaris Associate Membership program from unixadminschool.com.  Initially when i took the decision of launching a Membership program from unixadminschool.com, i was very much tensed and worried . In addition to that the deadlines that i have set for myself...

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Is your Redhat Linux Environment ready for Leap Second Insertion on Jun 30, 2015 ?

What is a Leap Second? A leap second is a second which is added to Coordinated Universal Time (UTC) in order to synchronize atomic clocks with astronomical time to within 0.9 seconds.A leap second is added (can be removed but this never actually happens in reality) on the...

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Linux Admin Reference – SUDO Configuration in RedHat Enterprise Linux

Sudo is different from the su command and is more flexible and more secure. The sudo command allows users to do tasks on a Red Hat Enterprise Linux system as another user. One significant advantage is that it can log usage. By default the program saves...

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