Any characters template for KRename and KrViewer

$ rename -n 's/(.{10}).*(\.jpg)$/$1$2/' *.jpg

The -n option only simulates the command, so that you can verify the changes. Run without it to actually make the changes.

The regex (.{10}).*(\.jpg) consists:

    .{10} - any 10 characters, in a group (…), followed by

    .* - any number of any characters followed by

    \.jpg$ - the extension at the end ($) of the filename, in the second group

The replacement $1$2 is just the first group followed by the second.