I've tried a bunch of examples of the rename command but I can't figure out the syntax to do what I want.I have a bunch of files labeled something likeFile_Ex_1.jpgFile_Ex_2.jpgFile_Ex_3.jpgFile_Ex_4.jpg...File_Ex_10.jpgFile_Ex_11.jpgetc. I want to change only some of them by inserting a 0 so that the file names have the same number of characters.So I want File_Ex_1.jpg to go to File_Ex_01.jpg, File_Ex_2.jpg to File_Ex_02.jpgHow do you do this with the rename command?This rename command was installed via home-brew on a Mac.Output of rename -v:rename -vUsage:    rename [switches|transforms] [files]    Switches:    -0/--null (when reading from STDIN)    -f/--force or -i/--interactive (proceed or prompt when overwriting)Wide character in print at /System/Library/Perl/5.18/Pod/Text.pm line 286.    -g/--glob (expand * etc. in filenames, useful in Windows CMD.EXE)    -k/--backwards/--reverse-order    -l/--symlink or -L/--hardlink    -M/--use=*Module*    -n/--just-print/--dry-run    -N/--counter-format    -p/--mkpath/--make-dirs    --stdin/--no-stdin    -t/--sort-time    -T/--transcode=*encoding*    -v/--verbose    Transforms, applied sequentially:    -a/--append=*str*    -A/--prepend=*str*    -c/--lower-case    -C/--upper-case    -d/--delete=*str*    -D/--delete-all=*str*    -e/--expr=*code*    -P/--pipe=*cmd*    -s/--subst *from* *to*    -S/--subst-all *from* *to*    -x/--remove-extension    -X/--keep-extension    -z/--sanitize    --camelcase --urlesc --nows --rews --noctrl --nometa --trim (see manual)
Rename files to add leading zeros to numbers
rename