Bash cheat sheet

xargs.sh

# Mingle ls/xargs/extension substitution
ls somepath/*.txt | xargs -n1 -i bash -c 'echo cp "$1" "${1%.txt}.dat"' - '{}'

# - `-n1` will make xargs take only one parameter at a time instead of the whole list of files.
# - Using a bash command allows to pass {} (which is a xargs args) to the shell and perform substitution on it
# source:
#  https://stackoverflow.com/a/965072/2603925
#  https://stackoverflow.com/a/45895212/2603925
#  https://stackoverflow.com/a/64924231/2603925