Bash String Comparisons

 Bash String Comparisons

Use the double equals ( == ) operator to compare strings inside square brackets []. Using this option you simply test if two given strings are equal or not inside bash shell scripts.

Example Syntax:

if [ "$str1" == "$str2" ]     # True if equal
if [ "$str1" != "$str2" ]     # True if not equal

Example:

For example, to compare whether two strings are equal or not.

if [ "hello" == "hello" ]    ## True
if [ "hello" == "hello1" ]   ## False

if [ "hello" != "hello" ]    ## False
if [ "hello" != "hello1" ]   ## True

Take input of two strings in a script and compare if both are the same or not, using if statement.

Shell

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#!/bin/bash read -p "Enter first string: " str1 read -p "Enter second string: " str2 if [ "$str1" == "$str2" ] then   echo "Both strings are same" else   echo "Both strings are different" fi