智能运维
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How to Check Disk Space in Linux
Introduction How much space do I have free on my Linux drive? Managing disk space on a Linux server is an important task. For example, package manager applications notify you how much disk space will…
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Snapshot vs Backup: The Main Differences
Introduction Snapshots and backups essentially have the same role. They make copies of the data on your system which you can later retrieve. If that is the case, the main question is what is the diff…
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How to Export a Table from MySQL to CSV
Introduction Only a limited number of applications read raw MySQL tables. A CSV file is much more likely to work with different database applications. CSV is a standard format for databases in which …
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Full vs Incremental vs Differential Backup: A Detailed Comparison
Introduction When setting up a backup plan, you need to take into consideration the resources available, as well as the amount of data you need to protect. With many different backup options to choos…
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How to Configure CentOS Network Settings
Introduction It is essential to know how to configure your network connections after installing CentOS. There are two ways to do so – via command line or the GUI. You can change network specific…
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Rsync Command: 20 Helpful Examples in Linux
Introduction Rsync, or Remote Sync, is a free command-line tool that lets you transfer files and directories to local and remote destinations. Rsync is used for mirroring, performing backups, or migr…
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How to Create MariaDB User and Grant Privileges
Introduction One of the most common tasks when administering a database is to oversee access and permissions. MariaDB is an open-source, fully compatible, relational database management system (RDBMS…
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How to Export a PostgreSQL Table to CSV
Introduction PostgreSQL (or Postgres) is an object-relational database management system similar to MySQL but supports enhanced functionality and stability. One excellent feature is that you can expo…
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How to Install SQL Workbench for PostgreSQL
Introduction SQL Workbench/J is not to be confused with MySQL Workbench. SQL Workbench is a tool designed to handle SQL queries no matter which fundamental Database Management System (DBMS) you use. …
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How to Remove Old Kernels on Ubuntu 16.04, 18.04, and 19.04
Introduction In Linux, the kernel is the core of the operating system. As new versions of Linux are released, your system may update to a newer kernel. By default, modern Linux versions keep the curr…