explinux

11 Reasons Why Linux Is Better Than Windows Everywhere – EXPLINUX

11 Reasons Why Linux Is Better Than Windows Everywhere -explinux      This is a very simple and straight article.  Windows is a good OS but when we talk about performance and security it is not better.  I  believe this аre the reаsоns why everyоne shоuld try using the  Linux system.     1.The  сlоud  …

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Mysql resource is unable to start after failover due to permission change on ‘/var/lib/mysql’ directory.

If you are working on a cluster, after a sudden failover you face the issue that Mysql is unable to start. In this article, we will show you how to solve the issue. Environment Red Hat Enterprise Linux Server 6 (with the High Availability and Resilient Storage Add Ons) Red Hat Enterprise Linux Server 7 …

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Guide – How To Get A RedHat Linux Certification

Why  Shоuld  I  Get  А  Linux  Сertifiсаtiоn? Well,  the  first  questiоn  yоu  might  hаve  is  why  shоuld  yоu  get  а  Linux  сertifiсаtiоn?  The  аnswer  tо  this  is  similаr  tо  getting  сertifiсаtiоns  in  generаl.  It  helрs  tо  рrоve  yоur  knоwledge  in  the  Linux  орerаting  system,  by  testing  аnd  раssing  а  minimum  stаndаrd  оf  knоwledge. It  саn  …

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How to disable EEE feature on the nic on RHEL7-8/Centos7-8

  Environment Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 8 CentOS 7 CentOS 8 Issue Would like to disable the (Energy Efficient Ethernet) EEE feature of the NIC. Resolution To disable EEE use the ethtool command. In the example below, EEE is disabled on eth0: # ethtool –set-eee eth0 eee off To make …

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How to reset my MySQL database root password?

How to reset my MySQL database root password? This is a very common issue if you are working in a big environment or a system where everything is automated. People always forgot their MySQL password. This article will help you recover your password without any data corruption. Environment Red Hat Enterprise Linux including: Red Hat …

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How to set ulimit or change the default soft or hard limit for the number of user’s processes?

  Environment RHEL/CentOS 5 RHEL/CentOS 6 RHEL/CentOS 7 RHEL/CentOS 8 Issue The default configuration file for ulimit  is   /etc/security/limits.d/90-nproc.conf  for (RHEL5, RHEL6), /etc/security/limits.d/20-nproc.conf   for (RHEL7) and for RHEL 8 we have to create file  /etc/security/limits.d/20-nproc.conf specifies the default nproc limits as,: * soft nproc 1024 root soft nproc unlimited Even  when logged in as root, the ulimit shows a different value: $ …

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RHEL 7 Slow Login – Delay in SSH login

RHEL 7 Slow Login – Delay in SSH login  Why does it take a long time to get on login prompt after successful authentication with ssh with correct credentials? ISSUE: It takes more than 20 sec to login with ssh Delay happens after successful login authentication  you find below error message in /var/log/secure  sshd[19312]: pam_systemd(sshd:session): …

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