课程第25次
#!/bin/shsub_ping() {
if ping -c 1 -w 2 -q$1 &>/dev/null
then
echo "$1 is online"
else
echo "$1 offline"
fi
}
for i in {1..254}
do
sub_ping 192.168.0.$i &
done
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ssh 远程ghost
(ssh 192.168.0.3 dd if=/dev/sda1 bs=4M)|dd of=/dev/sda1
做tar的时候用路径，解tar的时候也用绝对路径：
tar Jcvf /root/boot.tar.xz/boottar -C / -Jxvf/root/boot.tar.xz
https://www.itefix.net/cwrsync
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