MIPS平台前端显示移动硬盘的使用率

total=`df | grep "/dev" | awk '{print $2}'`
used=`df | grep "/dev" | awk '{print $3}'`
if ["$total" != ""]; then
nvram_set 2860 Total_Blocks ${total}"k"
nvram_set 2860 Used_Blocks ${used}"k"
fi

f [ ! -d "/var/spool/cron/crontabs"]; then
mkdir -p /var/spool/cron/crontabs
echo "*/1 * * * * blocks.sh" > /var/spool/cron/crontabs/admin
fi