$ ls -lat /boot
total 106000
drwxr-xr-x 23 root root     4096 Jan 17 12:25 ..
drwxr-xr-x  2 root root     4096 Jan 17 12:17 grub
drwxr-xr-x  3 root root     4096 Jan 17 12:17 .
-rw-r--r--  1 root root 19595458 Jan 17 12:17 initrd.img-4.9.0-8-amd64
-rw-r--r--  1 root root 19446192 Jan 17 12:08 initrd.img-4.9.0-5-amd64
-rw-r--r--  1 root root 19587298 Nov  7 13:58 initrd.img-4.9.0-7-amd64
-rw-r--r--  1 root root   186563 Oct 27 14:46 config-4.9.0-8-amd64
-rw-r--r--  1 root root  3195896 Oct 27 14:46 System.map-4.9.0-8-amd64
-rw-r--r--  1 root root  4232992 Oct 27 14:46 vmlinuz-4.9.0-8-amd64
-rw-r--r--  1 root root   186568 Aug 13 15:31 config-4.9.0-7-amd64
-rw-r--r--  1 root root  3192069 Aug 13 15:31 System.map-4.9.0-7-amd64
-rw-r--r--  1 root root  4232992 Aug 13 15:31 vmlinuz-4.9.0-7-amd64
-rw-r--r--  1 root root 19478453 Feb 19  2018 initrd.img-4.9.0-3-amd64
-rw-r--r--  1 root root   186473 Jan  4  2018 config-4.9.0-5-amd64
-rw-r--r--  1 root root  3185098 Jan  4  2018 System.map-4.9.0-5-amd64
-rw-r--r--  1 root root  4216608 Jan  4  2018 vmlinuz-4.9.0-5-amd64
-rw-r--r--  1 root root   186386 Sep 18  2017 config-4.9.0-3-amd64
-rw-r--r--  1 root root  3180929 Sep 18  2017 System.map-4.9.0-3-amd64
-rw-r--r--  1 root root  4204320 Sep 18  2017 vmlinuz-4.9.0-3-amd64

Linux arca 3.16.0-5-amd64 #1 SMP Debian 3.16.51-3+deb8u1 (2018-01-08)