In Ansible, a dictionary (also known as a hash, map, or associative array) is a data type that allows you to store and manipulate key-value pairs. Dictionaries are commonly used to represent configuration data, variables, and other structured information in Ansible playbooks. A dictionary in Ansible is enclosed in curly braces {} and consists of …
David Cao
If you’re a PostgreSQL user or developer, you may often need to monitor the size of your database to manage storage resources efficiently. One crucial aspect of this monitoring is checking the disk size of your database. In this post, we will explore how to get the disk size of a database in PostgreSQL. We …
In this post, we will delve into the concept of PostgreSQL server uptime, why it matters, and how to accurately measure it using SQL queries and built-in functions. By understanding how to obtain the uptime of a PostgreSQL server, you can gain valuable insights into your database’s reliability and performance, and proactively manage potential issues. …
As a popular and powerful open-source relational database management system, PostgreSQL is widely used in many applications. Knowing the version of PostgreSQL that you are working with is crucial for compatibility checking, troubleshooting, and ensuring that your application is utilizing the correct features and optimizations. In this post, we will explore different methods to retrieve …
This article is part of the following series. 4 ways to list files within a rpm package in Linux 3 ways to Check RPM package dependency in Linux How to use yum to list All versions of Package in Linux 5 ways to list installed packages in Linux RPM packages can contain not only …
A connection timeout means that the client attempted to establish a network socket to the SSH server, but the server failed to respond within the timeout period. ssh: connect to host 203.0.113.0 port 22: Connection timed out In PuTTY, you might see an error window with text like this: Network error: Connection timed out In …
This article is part of the following series. 4 ways to list files within a rpm package in Linux 3 ways to Check RPM package dependency in Linux How to use yum to list All versions of Package in Linux 5 ways to list installed packages in Linux If you’re working with an RPM-based …
systemctl is a command-line utility in Linux operating systems that is used to control and manage the system’s services, daemons, and other processes. It is an essential tool for system administrators and developers as it allows them to monitor and control various system processes. Viewing systemd information In systemctl, a “unit” is a systemd …
FIPS is an acronym that stands for Federal Information Processing Standards. It is a set of standards and guidelines developed by the United States federal government to establish uniform requirements for information security, including computer security, data protection, and cryptography. What is FIPS? FIPS publications are used by federal agencies and organizations that handle sensitive …
Security-Enhanced Linux (SELinux) is a security architecture for Linux systems that allows administrators to have more control over who can access the system. It was originally developed by the United States National Security Agency (NSA) as a series of patches to the Linux kernel using Linux Security Modules (LSM). Security Enhanced Linux (SELinux) provides an …