renaming files

[silver.bullet at zoho.com]

On Sun, 27 Sep 2015 14:31:01 -0400, Bill wrote:
>example:
>
>before:  test 5, test 6, test 7,  test 10, test 20
>
>these files should be renamed as
>
>after:    test 1, test 2, test 3,  test 4, test 5

[rocketmouse at archlinux Desktop]$ ls
rename.bash
[rocketmouse at archlinux Desktop]$ cat rename.bash 
#!/bin/bash

touch test\ 5 test\ 6 test\ 7 test\ 10 test\ 20
ls -v
sleep 3
o=1
for i in $(ls -v | sed s/"test"/""/g); do
  mv -i "test $i" "test $o"
  ((o=o+1))
done
ls -v
exit
[rocketmouse at archlinux Desktop]$ bash rename.bash 
rename.bash  test 5  test 6  test 7  test 10  test 20
mv: cannot stat ‘test rename.bash’: No such file or directory
rename.bash  test 2  test 3  test 4  test 5  test 6
[rocketmouse at archlinux Desktop]$