Tuesday, August 9, 2022

How to

Physical Volume is using an old PV header

Situation When running the pvs command the following warning is displayed: 

MegaCLI CheatSheet (2)

Get raid controller log MegaCli64 -adpeventlog -getevents -f lsi-events.log -a0 -nolog Raid Controller and Drive Status

Proxmox 5x “e1000 driver hang” fix

Problem: I started to experience proxmox servers going up and down, an intermittent response on the network (SSH),...

How To Fix “Device eth0 does not seem to be present, delaying initialization” Error on Centos

check network: # ifconfig lo        Link encap:Local Loopback           inet addr:127.0.0.1  Mask:255.0.0.0           inet6 addr: ::1/128 Scope:Host           UP...

Create Blocking Bad Bots Through Apache in WHM/cPanel

we see a lot of traffic from 'bad robots', these bots cause problems such as high server load, server instability and can...

Tools for load-testing HTTP servers

Knowing how much traffic your web server can handle when under stress is essential for planning future grow of your website or...

Set Up Routing with ip Command in Linux

Can you explain the ip command to setup routing on Linux based systems? How do I use the ip command to configure the routing...

How to Kill MySQL Queries

MySQL queries can sometimes be long-running and may prevent transactions from accessing necessary tables to complete a...

How to Fix Moodle error backup_controller_dbops_nonexisting

This error occurs when you duplicate an activity or import activities. I recently implemented...

How to fix Ceph error states “oldest is osd_failure(failed timeout osd.xx)

Hi, If your Ceph cluster encounters a slow/blocked operation it will log it and set the cluster health into...

Monitor site to site tunneling health for Cisco ASA using Zabbix

Requirement : - Zabbix server ( Zabbix 2.4 in this post)- Cisco ASA with tunnel site to site configured-...

How to Backup view and events only in MariaDB/MySQL

As a part of a migration, We need to export MySQL events from a MariaDB 10.2 and import them to another MariaDB...
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Safe Reboot Of Linux Using Magic SysRq Key

If you are working on kernel development, or device drivers, or running a code that could cause a kernel panic, the SysRq...

How to set a MySQL database to read-only mode

When we need to set the database as read-only on the fly (such as rebuild MySQL replication purpose) and we will use...

How to check LDAPS certificate and TLS version

Get OpenSSL (a list of 3rd party sites here; I went with this one). The connection to your DC thus: openssl...

How to run a manual backup on cPanel

You can use the /usr/local/cpanel/scripts/pkgacct script to create a cpmove archive for an account. After you create the archive, you can then restore the account on any cPanel...