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July 8, 2021 09:57
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Subtracts a number from filenames with a number in them (no leading zeros). For example: out321.png -> out300.png if NUMBER_TO_SUBTRACT=21
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| NUMBER_TO_SUBTRACT=217 | |
| for file in `ls -1v out*`; do | |
| echo $file | |
| NUMBER=${file:3:-4} | |
| NEW_NUMBER=$[NUMBER-NUMBER_TO_SUBTRACT] | |
| NEW_FILE_NAME="out${NEW_NUMBER}.png" | |
| echo $NEW_FILE_NAME | |
| mv $file $NEW_FILE_NAME | |
| done |
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