Batch process for file manager

bash.txt

Make Folder
for i in {11..30}; do mkdir S$i; done;

make file
for i in {1..30}; do cd "S$i"; unlink file.txt; cd ..; done;

bulk rename files in a folder
for filename in ./*.*; do mv "$filename" "./${filename%.*}.jpg"; done;

bulk rename files in a folder to sequential numbers
ls -v | cat -n | while read n f; do mv -n "$f" "$n.jgp"; done

bulk files rename in sequential numbers folder names
for i in {1..26}; do cd S$i; ls -v | cat -n | while read n f; do mv -n "$f" "$n.webp"; done; cd ..; done;