Category: Linux

Ubuntu releases new Intel microcode update to fix restart hangs

After the Intel processor transaction synchronization extension vulnerability was exposed last month, operating system developers such as Microsoft and Apple have made corresponding microcode updates to mitigate the vulnerability. The project teams of various...

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...