我的根目录显示到 Linux 内核的符号链接，它们是必要的吗？
root@NAS1:/# ls -l
total 94
drwxr-xr-x 3 root root 4096 Dec 15 2011 ~
drwxr-xr-x 2 root root 4096 Mar 19 01:37 bin
drwxr-xr-x 4 root root 2048 Mar 19 22:27 boot
drwxr-xr-x 23 root root 4920 Mar 19 22:31 dev
drwxr-xr-x 140 root root 12288 Mar 19 22:07 etc
drwxr-xr-x 6 root root 4096 Aug 1 2015 home
lrwxrwxrwx 1 root root 32 Mar 19 22:05 initrd.img -> boot/initrd.img-4.8.0-41-generic
drwxr-xr-x 22 root root 4096 Mar 19 01:35 lib
drwxr-xr-x 2 root root 4096 Mar 19 01:34 lib64
lrwxrwxrwx 1 root root 36 Jun 6 2015 libnss3.so -> /usr/lib/x86_64-linux-gnu/libnss3.so
drwx------ 2 root root 16384 Dec 11 2011 lost+found
drwxr-xr-x 15 root root 4096 Nov 26 2014 media
drwxr-xr-x 2 root root 4096 Jul 29 2016 mnt
drwxr-xr-x 4 root root 4096 Oct 10 20:42 opt
dr-xr-xr-x 206 root root 0 Mar 19 22:31 proc
drwx------ 26 root root 4096 Nov 10 22:34 root
drwxr-xr-x 37 root root 1200 Mar 19 22:55 run
drwxr-xr-x 2 root root 12288 Mar 19 01:37 sbin
drwxr-xr-x 3 root root 4096 Mar 16 2012 srv
dr-xr-xr-x 13 root root 0 Mar 19 23:38 sys
drwxrwxrwt 9 root root 4096 Mar 19 23:42 tmp
drwxr-xr-x 10 root root 4096 Dec 11 2011 usr
drwxr-xr-x 16 root root 4096 Feb 14 2015 var
lrwxrwxrwx 1 root root 29 Mar 19 22:05 vmlinuz -> boot/vmlinuz-4.8.0-41-generic