shell题一道
刚在linuxtone 见到一个案例，无奈无法回复，只好贴在这里，作为shell题目收集下来。文本如下
[*]lease 10.127.1.254 {
[*]starts 1 2012/08/20 06:58:48;
[*]ends 3 2012/09/19 06:58:48;
[*]tstp 3 2012/09/19 06:58:48;
[*]binding state active;
[*]next binding state free;
[*]hardware ethernet 11:22:33:44:55:84;
[*]uid "\001x+\313C\270\204";
[*]client-hostname "rac-ABCDEF";
[*]}
[*]lease 10.127.1.253 {
[*]starts 1 2012/08/20 06:58:48;
[*]ends 3 2012/09/19 06:58:48;
[*]tstp 3 2012/09/19 06:58:48;
[*]binding state active;
[*]next binding state free;
[*]hardware ethernet 11:22:33:44:55:84;
[*]uid "\001x+\313C\270\204";
[*]client-hostname "rac-AAAAA";
[*]}
要求将IP和主机名过滤出来，格式【IP 主机名】
已经有大牛提供了办法，但是我还是说下自己的解决思路：
1、利用grep将IP和主机名过滤出来
2、合并行
3、打印
全过程
[*]$ grep 'lease\|hostname' file.txt
[*]lease 10.127.1.254 {
[*]client-hostname "rac-ABCDEF";
[*]lease 10.127.1.253 {
[*]client-hostname "rac-AAAAA";
[*]
[*]$ grep 'lease\|hostname' file.txt |awk '{print $2}'
[*]10.127.1.254
[*]"rac-ABCDEF";
[*]10.127.1.253
[*]"rac-AAAAA";
[*]
[*]$ grep 'lease\|hostname' txt |awk '{print $2}' |awk '{if (NR%2==0){print $0} else {printf"%s ",$0}}'
[*]10.127.1.254 "rac-ABCDEF";
[*]10.127.1.253 "rac-AAAAA";
用的工具不同，步骤可以省略一两步
[*]$ awk '/lease/||/client-hostname/{print $2}' new
[*]10.127.1.254
[*]"rac-ABCDEF";
[*]10.127.1.253
[*]"rac-AAAAA";
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