完善化Raspberry Pi 上的 DS1302

上文交代了如何在Raspberry Pi 上安裝 DS1302 作為 Realtime check的基本方法, 作為一個system administrator的您一定會問:如何可以每次開機時, Raspbian也會在 DS1302內讀取 Realtime check 呢?

做法其實相當簡單, 只需在 /etc/rc.local 動動手腳加入/usr/sbin/mhwclock -load就可以了

#!/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.

# Print the IP address
_IP=$(hostname -I) || true
if [ "$_IP" ]; then
  printf "My IP address is %s\n" "$_IP" 
fi

/usr/sbin/mhwclock -load

exit 0

完成後我一般也會使用下面這個command來reboot unix system

sync;sync;reboot now