day 22

例题52

[root@iZwz96qzfgxh9l2rk7esxnZ xiti]# fg
vim 52.sh
#将用户家目录下面小于5KB的文件打包成tar.gz的压缩包，并以当前日期为文件名前缀
#!/bin/bash
t=`date +%F`
cd $HOME
tar czf $t.tar.gz `find ./ -type f -size -5k|xargs`

例题53

[root@iZwz96qzfgxh9l2rk7esxnZ xiti]# fg
vim 53.sh
#监控iptables规则是否封掉了22端口，如果封掉了，给打开。 写好脚本，放到任务计划里，每分钟执行一次
#!/bin/bash
iptables -nvL INPUT --line-numbers |grep -w 'dpt:22' |awk '$4 ~/REJECT|DROP/ {print $1}' > /tmp/iptables.log
n=`wc -l /tmp/iptables.log`

if [ $n -gt 0 ]
then
    for n in `tac /tmp/iptables.log`
    do
        iptables -D INPUT $n
    done
fi

例题54

[root@iZwz96qzfgxh9l2rk7esxnZ xiti]# vim 54.sh
#已知nginx访问的日志文件在/usr/local/nginx/logs/access.log内，请统计下早上10点到12点 来访ip最多的
#!/bin/bash
export LANG=en
log="/usr/local/nginx/logs/access.log"
t=`date +%d/%b/%Y:1[01]:[0-5][0-9]:`

egrep "$t" $log|awk '{print $1}' |sort -n |uniq -c |sort -n |tail -1 |awk '{print $2}'

例题55

[root@iZwz96qzfgxh9l2rk7esxnZ xiti]# vim 55.sh
#提示输入一个暂停的数字，然后从1打印到该数字。然后询问是否继续。继续的话再输入一个数字接着打印，否则退出脚本
#!/bin/bash
read -p "Please input a number: " n
n1=`echo $n |sed 's/[0-9]//g'`
if [ -n "$n1" ]
then
    echo "Please input a number."
    exit
fi

for i in `seq 1 $n`
do
    echo $i
done

read -p "If continue? y/n" c

case $c in
  n|N)
    exit
    ;;
  y|Y)
    read -p "Please input a number: " n2
    n3=`echo $n2|sed 's/[0-9]//g'`
    if [ -n "$n3" ]
    then
        echo "Please input a number."
        exit
    fi
    if [ $n2 -le $n ]
    then
        echo "$n2 should grater than $n."
        exit
    fi
    for i in `seq $[$n+1] $n2`
    do
        echo $i
    done
    ;;
  *)
    echo "Please input y or n."
    ;;
esac