not(A || B || C) => not(A) && not(B) && not (C) Note the change in the boolean operator or and and. Whereas you tried to do: not(A || B || C) => not(A) || not(B) || not(C) Which obviously doesn't work.

Jan 12, 2021 · Linux Bash scripting language provides the not equal “-ne” operator in order to compare two values if they are not equal. The not equal operator generally used with the if or elif statements to check not equal and execute some commands.

== is specific to bash (not present in sh (Bourne shell), ...). Using POSIX = is preferred for compatibility. In bash the two are equivalent, and in sh = is the only one that will work.

Jul 17, 2013 · Following the reference to "Bash Conditional Expressions" will lead you to the description of -ne, which is the numeric inequality operator ("ne" stands for "not equal). By contrast, != is the string inequality operator. You can also find bash documentation on the web.

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 example: echo "a and b are not equal"

Jul 30, 2024 · ‘!=’ Operator: Not Equal to operator return true if the two operands are not equal otherwise it returns false. ‘<‘ Operator: Less than operator returns true if first operand is less than second operand otherwise returns false.

Apr 26, 2025 · It stands for “not equal”, and it returns true if the values being compared are not equal to each other. It is primarily used in conditional expressions, such as the ‘if’ and ‘while’ statements. The general syntax for using the ‘-ne’ operator in a Bash script is as follows: Here, `VALUE1` and `VALUE2` represent the numeric values being compared.

For POSIX shells that don't support (()), you can use -lt and -gt. ... You can get a full list of comparison operators with help test or man test. As said by @jordanm "$a" -gt "$b" is the right answer. Here is a good list of test operator: Test Constructs. Beware that test is a program as is [. So help test gives information about that.

The “==” operator checks if two values are equal, while the “!=” operator checks if two values are not equal. This fundamental distinction allows you to create conditional statements with different outcomes based on the comparison result.

Discover how the bash not equal operator enhances your scripting skills. Master comparisons and boost your Bash prowess in no time. In bash, you can use `!=` to check if two strings are not equal within a conditional statement. Here's a code snippet demonstrating its usage: if [ "$var1" != "$var2" ]; then echo "The variables are not equal."