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

By explinux April 8, 2021centos 7, centos 8, mysql, rhel 7No Comments

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…

Guide – How To Get A RedHat Linux Certification

By explinux March 16, 2021REDHATNo Comments

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 …

Grub2 files are missing from /boot. How to recover ?

By explinux February 23, 2021boot, centos 7, centos 8, rhel 7, rhel 8No Comments

Grub2 or Boot Repair Due to some file corruption or mishandling we lost grub. This can cause the system to hang in the boot.When you reboot the system it will not…

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

By explinux January 19, 2021centos 7, centos 8, TroubleshootNo Comments

EnvironmentRed Hat Enterprise Linux 7Red Hat Enterprise Linux 8CentOS 7CentOS 8IssueWould like to disable the (Energy Efficient Ethernet) EEE feature of the NIC.ResolutionTo disable EEE use the ethtool command. In…

How to reset my MySQL database root password?

By explinux January 17, 2021centos 7, centos 8, mysql, rhel 7, rhel 8No Comments

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…

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

By explinux December 11, 2020centos 7, centos 8, limit, ulimitNo Comments

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…

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

Guide – How To Get A RedHat Linux Certification

Grub2 files are missing from /boot. How to recover ?

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

How to reset my MySQL database root password?

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

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