du -sh /*
du -sh ./*/*/
查看几目录的大小
hdparm /dev/sda 打开ide硬盘的dma
hdparm -d1 /dev/hda 打开hda1的dma
netconfig
route -n
ping -b 10.255.255.255
ifconfig eth0 10.0.0.254 netmask 255.255.255.0
man ifconfig
route -n
route add default gw 10.0.0.138
route -n
locale
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