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";