SHELL

shell set environment variable

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

linux set environment variable

# Linux - Bash 

# syntax 
# export *<variable-name>=*<variable-value>;

# example 
export ORACLE_SID='sales_database';

linux set environment

# syntax 
# setenv SHELL *<filepath-of-file-containing-environment-settings>

# example
setenv SHELL /usr/bin/bash

how to set environment variables in linux

export JAVA_HOME=/opt/openjdk11

how to set environment variables in linux

vi ~/.bash_profile