bash variable assignment not working

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1. powershell

   

2. How to Declare Variable in Bash Scripts? [5 Practical Cases]

   

3. Bash How to Assign Output to a Variable?

   

4. How to Assign Variable in Bash Script? [8 Practical Cases]

   

5. How to Assign Variable in Bash Script? [8 Practical Cases]

   

6. How to Assign Variable in Bash Script? [8 Practical Cases]