Sep 13, 2020 · Tutorial on how to compare numbers, strings and files in Linux bash shell script using if statement.

If you want to compare float numbers or float number to integer, you can use (( $(bc <<< "...") )). For example, a=2.00 b=1 if (( $(bc <<<"$a > $b") )); then echo "a is greater than b" else echo "a is not greater than b" fi You can include more than one comparison in the if statement. For example,

Nov 29, 2015 · Unless you have to use cmp, you can use [ ] for comparison: echo "Both words contents are same" echo "Both words contents are not same" cmp compares files. If, say, you entered foo for test1 and bar for test2, then it will compare two files named foo and bar, which is probably not what you intended. Aside from that, this line: is the same as:

In this tutorial, we’ll show you how to compare strings in a Bash script on a Linux system. We’ll show this in the context of a simple if/else Bash script so you can see how testing for this condition would work when developing scripts.

Nov 27, 2023 · Here I will develop a Bash script that will utilize the != operator to compare if two numeric variable is not equal or not. To know more, follow the below script.

Mar 25, 2025 · As Linux users, there will be times when we need to write a script to perform a certain task and iterate the script based on certain numeric conditions. In such cases, we use integer comparison operators in Bash. Specifically, there are two sets of integer comparison operators: square brackets and double parenthesis. Unfortunately, Bash doesn ...

May 3, 2019 · When comparing strings in Bash you can use the following operators: string1 = string2 and string1 == string2 - The equality operator returns true if the operands are equal. Use the = operator with the test [ command. Use the == operator with the [[ …

Feb 10, 2010 · The following script reads from a file named "testonthis" line by line and then compares each line with a simple string, a string with special characters and a regular expression. If it doesn't match, then the script will print the line, otherwise not.

Jan 31, 2018 · Numbers should be compared with -eq, = is for string comparison. In your case it should also work since the numbers are likely to be stored identically, but it's better to use the conceptually correct operator. == is a non-standard equivalent to =.

Apr 24, 2023 · In shell scripting, comparison operators and if statements are fundamental tools that enable you to test conditions and make decisions based on the results. By using these operators, you can...