Copying selected file from one location to another

cp `ls -SF | grep .log` /path/to/where/you/want/to/copy

Note 1: notice the backtick it's not inverted comma

Note 2: if you want to copy only files ending with .log for example, training1.log (yes) but training2.log.gz (no)
then use $ like:

cp `ls -SF | grep .log$` /path/to/where/you/want/to/copy

To limit the number of files to be copied you can use grep -m 100
this copies first 100 files.