When you gzip files, the original file is deleted.
If you have
file.txt and gzip it with
gzip file.txt you will now have
file.txt.gz but the original file is not there anymore.
To be able to gzip files and keep the original files untouched you can use this small script.
#!/bin/bash for i in $@; do gzip -c $i > $i.gz done
That works because you are redirecting the output of gzip to a new file.