SHELL

how to add linux path environment variable

#Ubuntu 20.04:
# echo 'export PATH=$PATH:/path/to/directory/here' >> ~/.bashrc 
echo 'export PATH=$PATH:$HOME/Android/Sdk/emulator' >> ~/.bashrc
#It's better to put $PATH at the beginning that way
#the new path environment variable will append to the old one
#update current shell
source ~/.bashrc

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';

how to set environment variables in linux

export JAVA_HOME=/opt/openjdk11

how to set environment variables in linux

vi ~/.bash_profile