Linux: Batch rename multiple files to parent dir + suffix in order of name - linux

Question

I need to batch rename multiple images and want to use the parent directory as base name. To prevent one overwriting the other, a suffix must be added. The order of the renaming process musts follow the timestamp of the file. Because the 'first' file is a featured image for the site I'm using it for.
Tree:
└── main
├── white tshirt
│   ├── IMG_1.jpg
│   ├── IMG_2.jpg
│   ├── IMG_3.jpg
│   └── IMG_4.jpg
├── black tshirt
│   ├── IMG_1.jpg
│   ├── IMG_2.jpg
│   ├── IMG_3.jpg
│   └── IMG_4.jpg
└── red tshirt
├── IMG_1.jpg
├── IMG_2.jpg
├── IMG_3.jpg
└── IMG_4.jpg
Goal:
└── main
├── white tshirt
│   ├── white-tshirt-1.jpg
│   ├── white-tshirt-2.jpg
│   ├── white-tshirt-3.jpg
│   └── white-tshirt-4.jpg
├── black tshirt
│   ├── black-tshirt-1.jpg
│   ├── black-thisrt-2.jpg
│   ├── black-tshirt-3.jpg
│   └── black-tshirt-4.jpg
└── red tshirt
├── red-tshirt-1.jpg
├── red-tshirt-2.jpg
├── red-tshirt-3.jpg
└── red-tshirt-4.jpg
Replacing spaces with dashes is not required, but preferred. Platform: Debian 8

Answer 1

I think this should do the job:
#!/bin/sh
for dir in *; do
if [ ! -d "$dir" ]; then
continue
fi
cd "$dir"
pref=$(echo "$dir" | tr ' ' -)
i=1
ls -tr | while read f; do
ext=$(echo "$f" | sed 's/.*\.//')
mv "$f" "${pref}-${i}.$ext"
i=$(expr $i + 1)
done
cd ..
done
Invoke the script inside your main directory and make sure there are only your target folders in it. Also make sure your files'names do not contain the character '\'