--> apt-cache policy linux-image-generic; ls /boot
linux-image-generic:
  Installed: 4.18.0.13.14
  Candidate: 4.18.0.13.14
  Version table:
 *** 4.18.0.13.14 100
        100 /var/lib/dpkg/status
total 142M
drwxr-xr-x  3 root root 4.0K 2019-03-25-13-35-33 .
drwxr-xr-x 25 root root 4.0K 2019-03-12-13-03-30 ..
-rw-r--r--  1 root root 1.5M 2018-10-11-14-24-45 abi-4.18.0-10-generic
-rw-r--r--  1 root root 212K 2018-10-11-14-24-45 config-4.18.0-10-generic
-rw-r--r--  1 root root 212K 2018-12-05-06-10-51 config-4.18.0-13-generic
drwxr-xr-x  6 root root 4.0K 2019-03-15-11-47-51 grub
-rw-r--r--  1 root root  39M 2019-03-15-11-44-06 initrd.img-4.18.0-10-generic
-rw-r--r--  1 root root  39M 2019-03-25-13-35-32 initrd.img-4.18.0-13-generic
-rw-r--r--  1 root root  39M 2019-03-07-16-11-38 initrd.img-4.18.0-13-generic.old-dkms
-rw-r--r--  1 root root 179K 2016-01-28-13-44-53 memtest86+.bin
-rw-r--r--  1 root root 181K 2016-01-28-13-44-53 memtest86+.elf
-rw-r--r--  1 root root 181K 2016-01-28-13-44-53 memtest86+_multiboot.bin
-rw-r--r--  1 root root   17 2018-10-11-14-24-45 retpoline-4.18.0-10-generic
-rw-------  1 root root 4.2M 2018-10-11-14-24-45 System.map-4.18.0-10-generic
-rw-------  1 root root 4.2M 2018-12-05-06-10-51 System.map-4.18.0-13-generic
-rw-r--r--  1 root root 8.2M 2018-10-18-00-08-10 vmlinuz-4.18.0-10-generic
-rw-------  1 root root 8.2M 2018-12-05-06-11-08 vmlinuz-4.18.0-13-generic