Ubuntu users can create or extract archives from the command line. The 7-Zip command-line utility creates and opens compressed archives, including .7z files. In this piece, I’ll show how to check and install the Ubuntu package for your release, then use 7z to create and extract an archive. TL;DR Install the Ubuntu package that matches
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A server rename begins by choosing the name Ubuntu should use for the machine. The hostnamectl command sets that system name, while the hosts file can map the name for local lookups. This article walks through changing the hostname and checking whether provisioning or DNS needs a separate update. TL;DR Run hostnamectl set-hostname with the
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To add a line or command output to a Linux file while keeping its current contents, use >>. The >> operator writes after the file’s current end, while > replaces its contents. I’ll show how to use >> for text and command output, then explain how a missing final newline or lack of write access
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Getting Jenkins running on Ubuntu or Debian starts with preparing the server for the installation. Jenkins is an automation server that runs jobs started by a person or a source-control event. I’ll show how to install Jenkins from its LTS package repository and open the setup page. TL;DR Install a supported Java runtime, add the
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For Python work on Ubuntu, install Jupyter Notebook in a virtual environment for the project. Jupyter Notebook combines code, its results, and written notes in one document. This article shows how to install Notebook and check which version is available in the environment. TL;DR Install Jupyter Notebook inside a Python virtual environment so its packages
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Changing a Debian machine’s name starts with choosing the hostname it should use. The hostname is the system label that Debian and local software use to identify the machine. In this piece, I’ll show how to set a persistent hostname with hostnamectl and check its local mapping in /etc/hosts. TL;DR: Change the Debian Hostname Set
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A shell script can offer actions as numbered choices. Bash select displays those choices, reads a selection, and repeats the menu body until break ends the loop. This piece explains how Bash select works and shows how to build a menu and check its response. TL;DR: Build a menu with Bash select Bash select prints
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A Bash loop can stop when a condition is met or skip an item and continue with the next one. The break and continue commands choose which of those actions Bash takes. In this piece, I’ll compare their effects and show how a numeric level targets a loop inside another loop. TL;DR: Choose break to
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To find the address assigned to a Linux network interface, start with a command that lists interface details. The ifconfig command displays interface addresses and status, while ip provides a compact address view. This article shows how to inspect one interface and how to list active or all interfaces. TL;DR ifconfig displays network-interface addresses and
ifconfig Command in Linux: Check Interfaces Read More »
Setting up PostgreSQL on Ubuntu starts with deciding whether the database will run on this machine or another one. psql is a terminal client for sending SQL commands to a PostgreSQL server. I’ll show how to select the package source and create an application role and database. TL;DR Install the PostgreSQL server for a local
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