Wednesday, January 27, 2021

How to

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...

How to Resize tmpfs on Linux

tmpfs is a temporary file system that stores data in virtual. It does not create an file or directory on your hard...

Proxmox 6.0 Bug, hung kernel and how to fix it.

We have been running Proxmox 6.0 in some servers and after a few weeks, they were having a hung issue. one-by-one all...

Delete OLD data from Zabbix database

If you are using Zabbix for a long time, then you might notice that the database size of Zabbix is increasing every day. Then...

Unable to start MySQL on Ubuntu: AVC apparmor=”DENIED” operation=”open”

MySQL on Ubuntu fails to start. The following error messages are shown in the output of the journalctl -xecommand: AVC...

Converting between image formats

qemu-img convert: raw, qcow2, qed, vdi, vmdk, vhd The qemu-img convert command can do conversion between multiple formats, including qcow2, qed, raw, vdi, vhd, and vmdk.

Migrate MyISAM tables to INNODB using mysqldump

In this article you will find information how to convert MyISAM tables to INNODB.  The procedure here is an...

Test TCP Port 25 (smtp) access with telnet

In this article I show you how to use telnet to test the access to a mail server on TCP port 25.

Configure Disk Quota on Ubuntu Server

Scenario: Disk quotas can be used to limit the amount of disk space or the number of files allocated...

Cannot access disk on zfs, Don’t Panic!!

I was having an issue with one of my Proxmox 5.0 version. When I was trying to start my VM it states...

Zimbra Server Status shows all failed services

Step by step guide to solve problem zimbra some services are not running the following: To fix this issue:Check...
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Most Read

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...

Managing Journal Systemd Ubuntu

By default, systemd-journald ensures older journal records or journal files are deleted in order to keep a certain amount of disk space...