Limpar o kernel obsoleto

Um comando interessante. Via > http://bit.ly/hi80CO

dpkg -l 'linux-*' | sed '/^ii/!d;/'"$(uname -r | sed\(.*\)-\([^0-9]\+\)/\1/")"'/d;s/^[^ ]* [^ ]* \([^ ]*\).*/\1/;/[0-9]/!d' | xargs sudo apt-get -y purge^C