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  • unary operator expected error in Bash if condition
    Make sure that when comparing a variable like $operation using string comparison you do not leave the possibility that $operation returns an empty string if you use the POSIX approach (single bracket) Both [ $operation == "man"] and [ "" == "man" ] return the same error: [: ==: unary operator expected
  • [Resolved] ‘Unary Operator Expected’ Error in Bash
    What Causes the ‘Unary Operator Expected’ Error in Bash Scripting? 3 Solutions to Fix ‘Unary Operator Expected’ Error in Bash Solution 1: By Quoting the Variables; Solution 2: Using the Double Bracket; Solution 3: By Setting Default Value Utilizing the “-z” Unary Operator to Avoid the ‘Unary Operator Expected’ Error; Conclusion
  • How to fix or avoid “bash: [: =: unary operator expected” on . . .
    This error typically happens when you are using the comparison operator with an if statement in bash, and you did not write the statement correctly! We’ll look at Why this error happens, two ways it can happen, and how you can fix (and better still, prevent) it
  • [SOLVED] Bash ‘Unary Operator Expected’ Error
    To fix the 'bash unary operator expected', ensure all variables in your comparisons are assigned and not empty This error typically occurs when you’re comparing variables in a Bash script and one of the variables is unassigned or empty Here’s a simple example: echo "Variable is not empty" echo "Variable is empty"
  • Solving the “Unary Operator Expected” Error - Baeldung
    In this tutorial, we’ll look at the “unary operator expected” problem, often encountered while evaluating expressions in conditional statements First, we’ll discuss what’s causing it Then, we’ll discuss a few solutions that will help us to solve this issue
  • shell script - If Condition operator: unary operator expected . . .
    Variable assignments in the shell don't take spaces around them This is an error condition of your test due to having an undeclared variable $EXISTING_SUM_CHECK You should have another check such as: EXISTING_SUM_CHECK=$latest_sum_check
  • How to Solve Unary Operator Expected Error in Bash
    This article explains how to solve the unary operator expected error in Bash Learn effective solutions such as checking for empty variables, using double brackets for conditions, and ensuring proper syntax





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