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  1. LinuxTect
    https://linuxtect.com/linux-bash-not-equal-ne-operators-tutorial

    Linux Bash Not Equal “-ne” , “!=” Operators Tutorial

    • Learn how to use the not equal operator (-ne or !=) in Linux Bash scripting language to compare two values and execute commands. See examples of comparing strings and numbers with if or elif stat… See more

    Not Equal “-Ne” Operator Syntax

    Linux bash not equal operator is expressed with the “-ne” which is the first letter of “not equal”. … See more

    LinuxTect
    Check If Specified String Is Not Equal

    In this example, we will check if the specified string bash variable is not equal to the specified string. We will create the string variable $name and check with the string “isma… See more

    LinuxTect
    Check If Specified Number Is Not Equal

    The not equal operator can be also used for numbers or integers to compare them each other. In the following example we will check if the bash integer variable $age is not equal t… See more

    LinuxTect
    The ‘Not Equal’ (!=) Operator | Bash Script Explained
    In Bash, the 'not equal' operator is represented by '!='. It’s primarily used in conditional statements to compare two values, such as if [ "$a" != "$b" ]. If the values are not equal, the condition be…
    IOFLOOD · https://ioflood.com/blog/bash-not-e…
    Feedback
    Table of Contents
    Not Equal “-Ne” Operator Syntax
    Check If Specified String Is Not Equal
    Check If Specified Number Is Not Equal
     

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  2. 12

    In Bash, you can compare strings using various operators to check if they are equal or not. To check if two strings are not equal, you can use the != operator.

    Example

    #!/bin/bash

    string1="Hello"
    string2="World"

    if [ "$string1" != "$string2" ]; then
    echo "Strings are not equal."
    else
    echo "Strings are equal."
    fi

    This script will output:

    Strings are not equal

    Important Considerations

    • Double Quotes: Always use double quotes around the variable names to avoid any word splitting or globbing issues1.

    • Whitespace: Ensure there is a blank space between the binary operator and the operands2.

    Alternative Solutions

    Using Double Square Brackets

    You can also use double square brackets [[ ]] for string comparison, which is more flexible and supports pattern matching.

    #!/bin/bash

    string1="Hello"
    string2="World"

    if [[ "$string1" != "$string2" ]]; then
    echo "Strings are not equal."
    else
    echo "Strings are equal."
    fi

    Using Logical Operators

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  3. Stack Overflow
    https://stackoverflow.com/questions/2237080

    How to compare strings in Bash - Stack Overflow

    How do I compare two string variables in an 'if' statement in Bash?
    bash - Shell equality operators (=, ==, -eq)
    See more results
     
  4. Unix & Linux Stack Exchange
    https://unix.stackexchange.com/questions/67898

    Using the not equal operator for string comparison

    String comparison failing in bash - Unix & Linux Stack ExchangeSep 30, 2015
    Bash not equal string comparison
    See more results
  5. IOFLOOD
    https://ioflood.com/blog/bash-not-equal

    The ‘Not Equal’ (!=) Operator | Bash Script Explained

    Dec 4, 2023 · In Bash, the 'not equal' operator is represented by '!='. It’s primarily used in conditional statements to compare two values, such as if [ "$a" != "$b" ]. If the values are not equal, the condition becomes true. Here’s a simple …

  6. TecAdmin
    https://tecadmin.net/bash-not-equal-operator

    Using the ‘-ne’ Operator in Bash: A Comprehensive Guide

  7. LinuxSimply
    https://linuxsimply.com/.../if-string-equals

    Check If A String Equals to Another String in Bash [5 …

    Apr 1, 2024 · Learn how to compare two strings in Bash using comparison operators, test command, or case statement. See examples of using equal, double equal, not equal, and test operators to check string equality.

  8. People also ask
    How to check if two strings are equal in Bash?
    Bash offers an equal = operator to compare two strings to check their equality. To check if strings are equal, use the equal operator within the if-else statement. If the strings are equal, the condition evaluates true. Otherwise, the condition evaluates false. Follow the below script to check if the two strings are equal: echo "Strings are equal."

    Check If A String Equals to Another String in Bash [5 Methods]

    linuxsimply.com
    How to check if a string is not equal?
    The not equal comparison operator returns a boolean value which can be True or False. Generally, this boolean value is used with the if or elif statements. In this example, we will check if the specified string bash variable is not equal to the specified string. We will create the string variable $name and check with the string “ismail”.

    Linux Bash Not Equal “-ne” , “!=” Operators Tutorial - LinuxTect

    linuxtect.com
    What is a 'not equal' operator in Bash?
    The ‘not equal’ operator in Bash, represented by ‘!=’, is a fundamental tool in Bash scripting. It’s used primarily in conditional statements, which are the backbone of any script, allowing you to make decisions and control the flow of your script. Let’s dive into a simple example to illustrate this: echo "You are not John!" # 'You are not John!'

    The ‘Not Equal’ (!=) Operator | Bash Script Explained

    ioflood.com
    How do you compare two strings in Bash?
    We then use the test command and the = operator to compare these two strings. If the strings are equal, we print Strings are equal. If they're not, we print Strings are not equal. Note that In Bash, you can either use = (single equal sign) or == (double equal sign) for string comparison.

    Bash Compare Strings: How to Check if Two Strings Are Equal - DevOp…

    kodekloud.com
    What is a not equal operator in Linux?
    The not equal operator generally used with the if or elif statements to check not equal and execute some commands. Linux bash not equal operator is expressed with the “-ne” which is the first letter of “not equal”. Also the “!=” is used to express not equal operator. The “!= ” is also popularly used in other programming languages for not equal.

    Linux Bash Not Equal “-ne” , “!=” Operators Tutorial - LinuxTect

    linuxtect.com
    How to print if strings are equal in Bash?
    If the strings are equal, we print Strings are equal. If they're not, we print Strings are not equal. Note that In Bash, you can either use = (single equal sign) or == (double equal sign) for string comparison. Before we can run this script, let’s place it inside the demo.sh script file.

    Bash Compare Strings: How to Check if Two Strings Are Equal - DevOp…

    kodekloud.com
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  9. Linuxize
    https://linuxize.com/post/how-to-compare-strings-in-bash

    How to Compare Strings in Bash - Linuxize

  10. Linux Handbook
    https://linuxhandbook.com/bash-test-o…

    Test Operators in Bash [Cheat Sheet] - Linux Handbook

    Oct 4, 2023 · Learn how to use test operators in bash to evaluate conditions such as string equality or file existence. See examples of integer, string, compound and file comparison operators.

  11. GNU Wget
    https://www.gnu.org/software/bash/manual/html_node/...

    Bash Conditional Expressions (Bash Reference Manual)

  12. phoenixNAP
    https://phoenixnap.com/kb/bash-string

    Bash String Comparison {How-to Guide} | phoenixNAP KB

  13. KodeKloud
    https://kodekloud.com/blog/bash-compare-strings

    Bash Compare Strings: How to Check if Two Strings Are Equal

  14. Linux Handbook
    https://linuxhandbook.com/bash-string-comparison

    Bash String Comparison: 3 Practical Examples - Linux Handbook

  15. Tutorial Kart
    https://www.tutorialkart.com/bash-shell-scripting/bash-strings-equal

    Bash – Check if Two Strings are Equal - Tutorial Kart

  16. Stack Overflow
    https://stackoverflow.com/questions/1728683

    Case insensitive comparison of strings in shell script

  17. LinuxConfig.org
    https://linuxconfig.org/bash-script-string-comparison-examples

    Bash script: String comparison examples - LinuxConfig

  18. thelinuxcode.com
    https://thelinuxcode.com/bash-scripting-for...

    Bash Scripting for Beginners: A Comprehensive 3150-Word Guide

  19. Stack Overflow
    https://stackoverflow.com/questions/23113006

    Two equal strings evaluate as not equal in bash - Stack Overflow

  20. Linux Handbook
    https://linuxhandbook.com/check-bash-array-empty

    Check if Array is Empty in Bash - Linux Handbook

  21. Stack Overflow
    https://stackoverflow.com/questions/3265803

    equals - bash string equality - Stack Overflow

  22. Tutorial Kart
    https://www.tutorialkart.com/bash-shell-scripting/bash-subtraction

    Bash Subtraction – Syntax, Examples - Tutorial Kart

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