我尝试使用etc / rc.local在新的Ubuntu Mate上安装RPI 2上的openssh-server。所以我试着用这个：
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
apt-get update && apt-get -y install openssh-server
exit 0
但在RPi上没有安装或更改任何内容。我做错了什么？