shell知识
for： for VAR in LISTdo
COMMANDS
done
LIST的写法：
直接写：for i in 1 2 3
大括号扩展：for i in {0..99}
通配符：for i in /etc/*.conf
命令的结果：for i in `find /etc/ -name "*.conf"`
C风格：for ((i=0;i /dev/null
if [ "$?" == "0" ] ; then
echo "192.168.18.$i online."
else
echo "192.168.18.$i offline."
fi
done
方法二：
for i in {252..254} ; do
if ping -c1 192.168.18.$i &> /dev/null ; then
echo "192.168.18.$i online."
else
echo "192.168.18.$i offline."
fi
done
方法三：
for i in {252..254} ; do
result=`ping -c1 192.168.18.$i | grep ttl | cut -d "=" -f 2 | cut -d " " -f 2`
if [ "$result" == "ttl" ] ; then
echo "192.168.18.$i online."
else
echo "192.168.18.$i offline."
fi
done
mssh.sh
#!/bin/bash
#mssh.sh "IP1 IP2""service iptables stop"
for i in $1 ; do
ssh $i $2
done
监控磁盘
#!/bin/bash
for space in `LANG=C df -h | grep -v Use | awk '{print $5}' | cut -d "%" -f 1`
do
if [ $space -get 80 ] ; then
echo "Over 80%" | mail -s "report" root@localhost
else
echo "Disk space normail" | mail -s "report" root@localhost
fi
done
页:
[1]