I've got a question that I hope one of you Bash shell script gurus can 
answer: given a filename that contains a number, how does one create a new 
filename with the number incremented by one?

An example.  Suppose I have a file with this name:

    filename1234.txt

My goal in this case would be to parse this filename such that the number 
would be extracted then incremented, and a new name, containing the 
incremented number would be created.  In this case, I would seek to create 
this filename:

    filename1235.txt

Can someone advise me on how this can be done in Bash?

Thanks.



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