how to add WSP file in central admin through Management Shell

Question

I am adding wsp file as it already exist now I need to update it..

Its giving me a error message on management shell that

A solution with the same name and id already exist.

I am writing this command in management shell.

 Add-SPSolution "c:\Deploy\WSP\{file name}.wsp"  

Like this

Add-SPSolution "c:\\Deploy\\WSP\\SharePointProject2.wsp "

Answer 1

There are two ways you can achieve this:

1. Use 'Update-SPSolution' Or
2. Remove solution using 'Remove-SPSolution' and add again using 'Add-SPSolution'