files under /boot

[Michael Morgan]

Dear friends,

 

Here are files under my /boot directory:

 

# ls -l

-rw-r--r-- 1 root root   186716 Nov 11  2019 config-4.9.0-11-amd64

-rw-r--r-- 1 root root   186696 Jan 20 12:38 config-4.9.0-12-amd64

drwxr-xr-x 5 root root     4096 May 28 20:14 grub

-rw-r--r-- 1 root root 18158152 May  1 01:18 initrd.img-4.9.0-11-amd64

-rw-r--r-- 1 root root 18818504 May 28 20:14 initrd.img-4.9.0-12-amd64

-rw-r--r-- 1 root root  3204823 Nov 11  2019 System.map-4.9.0-11-amd64

-rw-r--r-- 1 root root  3206712 Jan 20 12:38 System.map-4.9.0-12-amd64

-rw-r--r-- 1 root root  4249376 Nov 11  2019 vmlinuz-4.9.0-11-amd64

-rw-r--r-- 1 root root  4261664 Jan 20 12:38 vmlinuz-4.9.0-12-amd64

 

# hostnamectl

  .

  Operating System: Debian GNU/Linux 9 (stretch)

            Kernel: Linux 4.9.0-12-amd64

      Architecture: x86-64

 

Is it fine I delete all 4.9.0-11 files under /boot?

 

Thank you very much.

 

Michael