List the current directory contents.
ls
echo "'hello'" | grep -c "'hello'"
ls -R | grep ":$" | sed -e "s/:$//" -e "s/[^-][^\/]*\//--/g" -e "s/^/ /" -e "s/-/|/"
tmpfile=$(mktemp)
cat << 'END_DOC' > $tmpfile
Temp file content
END_DOC
echo $tmpfile
cat $tmpfile