Archive for the ‘RHEL 6’ Category

Linux: The GHOST Vulnerability | RHEL | CentOS

The GHOST vulnerability is a serious weakness in the Linux glibc library. It allows attackers to remotely take complete control of the victim system without having any prior knowledge of system credentials. CVE-2015-0235 has been assigned to this issue.   Qualys security researchers discovered this bug and worked closely with Linux distribution vendors. And as […]

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SAR GUI: Export sar / sysstat reports as PDF using kSar

Hello, If you are Linux Administrator you must know what SAR is, sar is a very useful utility for Linux Administrators to get the report of CPU Usage and You can monitor I/O, CPU Usage, Idle system state using sar utility. This article will help you to read / export sar reports in Graphical mode. […]

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ShellShock Bug: Check / Identify / Solve Vulnerability

Hello, Patch your bash now Just heard that your shell / bash may be vulnerable or buggy. This post will help you to check whether your Shell / bash of Red Hat Enterprise Linux is vulnerable / Bug infected or not. How does this impact systems This issue affects all products which use the Bash […]

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MySQL: Drop all tables from Database using Script / Linux

Hello, Few days back, I got a task to do, Task was Keep the database as it is, So that we do not have to add database users, privileges and everything again and again, Just Drop all the databases tables inside the database. If there are only few tables like 5 or 10 than it […]

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RHEL 7 / CentOS 7 : Single User Mode / Recovering / Reset Root Password

Hello, Setting up the root password is a mandatory part of the Red Hat Enterprise Linux 7 / CentOS 7installation. If you forget or lose your password, it is possible to reset it. Now it is known as Rescue Mode / Emergency mode in CentOS / RHEL 7, Previously in RHEL / CentOS 5/6 It was “Single User […]

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RHEL 7 / CentOS 7: How to get started with Firewalld

Hello All, Today I was trying to learn and know about Systemd. I have found one of the great Article about firewalld, Sharing with you guys, It will help you to understand this biggest and major change in RHEL and CentOS 7. This article is not mine, I found on internet and felt that this […]

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RHEL 7 / CentOS 7 : Disable Firewalld and use iptables

Hello, Just installed CentOS 7 on my Virtual machine and realized that, Firewalld is bit complicated as I am using iptables firewall from many years. So decided not to use firewalld at least as of now and wanted to continue with iptables commands as I was using in RHEL / CentOS 5 and 6. I […]

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Information on Red Hat Certification / RHCE / RHEV / Red Hat OpenStack / RHEL 7

Hello Friends, RHEL 7 is released, I am getting constant calls / emails / messages from many friends from different different places regarding their doubts on RHEL 5 to 6 or 6 to 7 up-gradation. Sharing this to clear confusion / doubts. Clear your doubts Regarding Up-gradation :- 1. Yes, RHEL 7 is out, but […]

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