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Kill Command

Basic syntax and usage of the kill command

Import CSV Into Postgres

How to import data from a CSV file into a PostgreSQL table

Chmod 755

General meaning, examples, and flags for chmod 755

Exclude With Grep

Excluding unwanted key terms or directories when using grep

Grep In a Directory

Grep to search for words/phrases in directories and subdirectories

How To Reinstall Packages With Npm

Brief guide to reinstalling npm packages using npm

How To Use Unix Wildcards

How to use wildcard characters in Linux/Unix commands

How To Update Yarn

How to update yarn and related troubleshooting

How To Run a SQL File With psql

Importing a SQL file into a PostgreSQL database with psql

Grep Across Multiple Lines

Guide on several cases of using grep across multiple lines

What Does sudo chown Do?

Why sudo chown is sudo and some common pitfalls

Run a Shell Script in a Dockerfile

When and how to run a shell script in a Dockerfile

How To Use sudo su

A quick overview of using sudo su

How to Add a User to Sudoers

Grant elevated privileges to users

POST JSON data with cURL

Different ways of sending JSON via cURL

Vim Modes

Learn about seven of Vim’s modes

Grep Count

Efficiently count lines or occurrences in a file.

Grep Multiple Strings

For two or more string, use an “or” expression (\|), or the -e flag.

Vim Find and Replace

Use either substitute or slash & dot

Select all in Vim / Vi

Select all and copy, paste, or delete the contents

mkdir if not exists

Create directories when they don’t already exist

Git Push Origin

A breakdown of git push origin

Searching in Vim

Search forward, backward, case insensitive, and more

Kill a Process in Linux

Strategies for finding and killing processes

Linux Chmod Command

Review how to best use the chmod command

Linux File Permissions Explained

Understand what common expressions do

How to use sudo rm -rf safely

We'll help you understand its components

Show & Hide Line Numbers in Vim / Vi

Toggle absolute and relative line numbers

How to run cron every hour

along with variations and examples

Go To End of File in Vim / Vi

Select and delete to the end of a file in Vim

How to run chmod recursively

Using -R is probably not what you want

Vim / Vi Page Up and Down Controls

Quick reference for Vim's page up and down controls

Bash printf

How to use string formatting with bash printf

How to delete lines in Vim / Vi

The best answer depends on which mode you use

Bash Comments

Comments will help make your scripts more readable

Delete a File in Python

There are two approaches to deleting a file in Python

Bash Concatenate Strings

Join two strings together in Bash

Curl Post Request

Use cURL to send data to a server

Bash Aliases

Create an alias for common commands

Reading User Input

Via command line arguments and prompting users for input

Bash Case Statement

A popular alternative to the if-then-else statement

How to Make Grep Case Insensitive

By default, grep is case sensitive

Undo & Redo in Vim / Vi

Keyboard shortcuts and summary of how Vim tracks changes

Copy & Paste in Vim / Vi

Copy (Yank), Paste (Put) and Cut (Delete) in Vim