Understanding the Command Line Environment: Aliases, Environment Variables, and History, Cheat Sheet of Applications of Computer Sciences

Download Understanding the Command Line Environment: Aliases, Environment Variables, and History and more Cheat Sheet Applications of Computer Sciences in PDF only on Docsity! / The environment of the command line refers to the settings and preferences of the current user. It enables users to set greetings, alias commands, variables, and much more. For Unix-based systems like Mac OS and Linux (not Windows), the shell command env returns a list of environment variables for the current user. The shell command alias is used to assign commonly used commands to shortcuts (or aliases). The assigned commonly used command should be wrapped in double quotes. Variables that can be used across terminal commands are called environment variables. They also hold information about the shell’s environment. All the commands in ~/.bash_prole are executed with the shell command source ~/.bash_profile . So when changes are made to ~/.bash_prole, run this command to activate the changes in the current session. The history shell command is used to get a history of commands (also known as “events”) that were executed in the current session. The command also allows us to perform operations on this list of commands that have been executed, such as selecting or manipulating a command in the history. Cheatsheets / Learn the Command Line Configuring the Environment Command line environment Shell Command env Alias Environment Variables Source Bash Prole history command in Unix Systems # The following command creates an alias `pd` for the command `pwd` alias pd="pwd"