# Rename all spaces in a file to '_'(underscores) making them more Unix-y...
# think of s/\s as s/(substitute) \s(spaces) /(with) '_'(underscores) /globally(/g),
# while * *(selects all files with spaces in them).
rename -v -n 's/\s/_/g' * *
# The -v is for verbosity and printing the results of the operation to the screen,
# and -n or -nono is an optional option for testing a rename, before actually renaming.
# If your satisfied you can remove the -n and make the changes.