how to set environment variables in linux code example

Example 1: shell set environment variable

export VARNAME="my value"      # shorter, less portable version

Example 2: zsh list environment variables

It sounds like you want env.

Example 3: how to set environment variables in linux

source ~/.bash_profile

Example 4: how to set environment variables in linux

export JAVA_HOME=/opt/openjdk11

Example 5: how to set environment variables in linux

vi ~/.bash_profile