for the ls parsing example, you can do shopt -s nocaseglob ls ~/Downloads/*.{png,jpg,jpeg,gif,webp} ---- for command line tools (grep/sed/awk/sort/etc), you

for the ls parsing example, you can do shopt -s nocaseglob ls ~/Downloads/*.{png,jpg,jpeg,gif,webp} ---- for command line tools (grep/sed/awk/sort/etc), you can refer my ongoing project (https://github.com/learnbyexample/Command-line-text-processing https://github.com/learnbyexample/Command-line-text-processi...) as resource :)