Search:
aptitude search linux-image-
Install:
aptitude install linux-image-xxxx
Or find and download a .deb file online and install it:
wget http://kr.archive.ubuntu.com/ubuntu/pool/main/l/linux-lts-utopic/linux-image-3.16.0-30-generic_3.16.0-30.40~14.04.1_amd64.deb
sudo dpkg -i *.deb
Check the kernel install history:
dpkg --get-selections | grep linux-image
Remove an old kernel:
aptitude remove linux-image-3.19.0-18-generic
linux kernel exploits db