gentoo系统一些问题以及解决方法

问题1：
!!! Your current profile is deprecated and not supported anymore.
!!! Use eselect profile to update your profile.
!!! Please upgrade to the following profile if possible:
        default/linux/amd64/13.0

解决：# eselect profile list
Available profile symlink targets:
  [1]   default/linux/amd64/13.0
  [2]   default/linux/amd64/13.0/selinux
  [3]   default/linux/amd64/13.0/desktop
  [4]   default/linux/amd64/13.0/desktop/gnome
  [5]   default/linux/amd64/13.0/desktop/kde
  [6]   default/linux/amd64/13.0/developer
  [7]   default/linux/amd64/13.0/no-multilib
  [8]   default/linux/amd64/13.0/x32
  [9]   hardened/linux/amd64
  [10]  hardened/linux/amd64/selinux
  [11]  hardened/linux/amd64/no-multilib
  [12]  hardened/linux/amd64/no-multilib/selinux
  [13]  hardened/linux/uclibc/amd64

# eselect profile set 1
#emerge --sync