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 theechocommand to view a single environment variable. For example:

echo $PATH

2. Useenvto view all environment variables. For example:

env

3. Usesetto view all locally defined environment variables.

Commonly used environment variables:

PATHdetermines which directories the shell will search for commands or programs

HOMECurrent user’s home directory

HISTSIZE　Number of historical records

LOGNAMECurrent user’s login name

HOSTNAME　Refers to the name of the host

SHELLCurrent user Shell type

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

MAIL　The current user’s mail storage directory

PS1　Basic prompt, for therootuser is#, for ordinary users it is$

Related recommendations: "Linux Tutorial"

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