perl -pe 's#.+/##' file.txt

perl -MFile::Basename -pe '$_=basename $_' file.txt
perl -MFile::Basename -ne 'print basename $_' file.txt

perl -ne 'print ( (split("/", $_))[-1] )' file.txt
perl -F/ -ane 'print $F[-1]' file.txt

cut -d/ -f6 file.txt