Rules :
- Variable name cannot start with a number
There are two types of variable :
- System variables. (Example : $BASH) (Conventionally in all sCAPS)
- User defined variables (Conventionally in small letters)
#! /bin/bash -x # comments example echo "Hello Inline Comment" # This is the inline comment # 1st System Variables #capital variables are system variables Example $BASH # 2nd User defined Variabled # small letters # export echo $BASH # System Variable echo $BASH_VERSION echo $SHELL echo ---------------- name=Tyson echo The name is $name echo Home directory is $HOME

Reference :