Category: Linux

How to optimize MySQL Query Cache

One simple task you can do to speed up your website is to activate the MySQL Query Cache mode. The query cache stores the text of a SELECT statement together with the corresponding result that...

How to Backup and Restore MySQL Database

In the previous article, I shared how to create a mysql database in Linux. Today, on this post, I’m going to guide you on how to backup and restore the mysql database. Backup mysql...

How to create mysql database in Linux

MySQL is an open-source relational database management system. Its name is a combination of “My”, the name of co-founder Michael Widenius’s daughter, and “SQL”, the abbreviation for Structured Query Language. In this post, I’m...

How to install Redis on Linux

Redis is an in-memory data structure project implementing a distributed, in-memory key-value database with optional durability. Redis supports different kinds of abstract data structures, such as strings, lists, maps, sets, sorted sets, HyperLogLogs, bitmaps,...

Easy way to install OpenVPN Server in Linux

VPN (Virtual Private Network), between the client and the host to establish an encrypted tunnel, the client’s request to encrypt all the way to send to the VPN server. The mainstream VPN is divided...

How to fix GPG error NO_PUBKEY in Ubuntu

Sometimes, you can get an error like below when you use apt-get update command: W: GPG error: http://archive.canonical.com trusty Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY...

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KNOPPIX 8.6.1 releases, D-ROM bootable GNU / Linux system

KNOPPIX is a CD-ROM bootable GNU / Linux system (LiveCD), features include automatic hardware monitoring, support for common graphics cards, sound cards, SCSI and USB devices, and other peripherals. KNOPPIX can be used for...

How to check DDOS attack with command-line on Linux

Your server appearing pretty slow could be many things from wrong configs, scripts, and dodgy hardware – but sometimes it could be because someone is flooding your server with traffic known as DoS (Denial...