Linux BASH – Comparison Operators

Linux BASH – Comparison Operators

 Integer Comparison Operators

Operator	Description	Example
-eq	Is Equal To	if [ $1 -eq 200 ]
-ne	Is Not Equal To	if [ $1 -ne 1 ]
-gt	Is Greater Than	if [ $1 -gt 15 ]
-ge	Is Greater Than Or Equal To	if [ $1 -ge 10 ]
-lt	Is Less Than	if [ $1 -lt 5 ]
-le	Is Less Than Or Equal To	if [ $1 -le 0 ]
==	Is Equal To	if (( $1 == $2 )) [Note: Used within double parentheses]
!=	Is Not Equal To	if (( $1 != $2 ))
<	Is Less Than	if (( $1 < $2 ))
<=	Is Less Than Or Equal To	if (( $1 <= $2 ))
>	Is Greater Than	if (( $1 > $2 ))
>=	Is Greater Than Or Equal To	if (( $1 >= $2 ))

 String Comparison Operators

Operator	Description	Example
= or ==	Is Equal To	if [ “$1” == “$2” ]
!=	Is Not Equal To	if [ “$1” != “$2” ]
>	Is Greater Than (ASCII comparison)	if [ “$1” > “$2” ]
>=	Is Greater Than Or Equal To	if [ “$1” >= “$2” ]
<	Is Less Than	if [ “$1” < “$2” ]
<=	Is Less Than Or Equal To	if [ “$1” <= “$2” ]
-n	Is Not Null	if [ -n “$1” ]
-z	Is Null (Zero Length String)	if [ -z “$1”]