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What if I had many files but needed to change the extensions of them and they all have different extensions.
For example, I need an sed command to change the file "batman.CPP" to be "batman.cpp"
And I also have a file "kingsandqueens.dat" and I need it to be "kingsandqueens.backup"
I need a shell script that will do this for me if I were to execute the program as ./chExt1.sh 'cpp' 'batman.CPP'
or ./chExt1.sh 'backup' 'kingsandqueens.dat'
also for changing CAP to lower case there are small shell scripts already posted all over the net
almost EVERY tutorial site would have something
a simple " for i in *; do mv "$i"........... "
Not sure why you would use sed at all. As suggested a simple loop and the mv command would be enough or if your distro has it have a look for the rename command.
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