How to check environment variables under Linux?

This article mainly introduces the command method to view environment variables under Linux. I hope it will be helpful to friends in need!

Viewing environment variables

1. Use the echo command to view a single environment variable. For example:

echo $PATH

2. Use env to view all environment variables. For example:

env

3. Use set to view all locally defined environment variables.

Commonly used environment variables:

PATH determines which directories the shell will search for commands or programs

HOME Current user’s home directory

HISTSIZE　Number of historical records

LOGNAME Current user’s login name

HOSTNAME　Refers to the name of the host

SHELL Current user Shell type

LANGUGE Language-related environment variables, multi-language can be modified This environment variable

MAIL　The current user’s mail storage directory

PS1　Basic prompt, for the root user is#, for ordinary users it is $

Related recommendations: "Linux Tutorial"

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