To write a Bash shell loop over a set of files, you can use a for loop. For example, if you have a directory containing several files, you can use the ls command to list the files in that directory, and then use a for loop to iterate over the list of files, like this:
for file in $(ls); do
# commands to process each file go here
done
In the above example, the for loop will iterate over the list of files returned by the ls command, and the variable $file will be set to the name of each file in turn. Inside the loop, you can use the $file variable to refer to the current file, and run any commands you want to process that file.
For example, you could use the cat command to display the contents of each file, like this:
for file in $(ls); do
cat $file
done
Alternatively, you could use the wc command to count the number of lines, words, and characters in each file, like this:
for file in $(ls); do
wc $file
done
You can use any commands you want inside the for loop, as long as they are appropriate for processing the files in the directory.