如何获取此内容中的所有ipv4地址
[英]how to get all the ipv4 address in this content
问题描述
Would any body please tell me how to get all the ipv4 address(in the "()") in this content in bash in linux? 
有没有人请告诉我如何在linux中的bash中获取这个内容中的所有ipv4地址（在“（）”中）？
traceroute to 223.5.5.5 (223.5.5.5), 30 hops max, 60 byte packets
1 1.2-88-23.rdns.scalabledns.com (23.88.2.1) 0.388 ms 0.404 ms 0.415 ms
2 dist01-dc03-core.dc08.lax.ip4.scalabledns.com (172.246.0.235) 0.273 ms 18.825 ms 0.247 ms
3 207.254.184.97 (207.254.184.97) 0.660 ms 0.771 ms 0.834 ms
4 199.102.95.6 (199.102.95.6) 0.836 ms 0.808 ms 0.782 ms
5 219.158.30.53 (219.158.30.53) 192.201 ms 192.186 ms 192.160 ms
6 219.158.97.17 (219.158.97.17) 168.116 ms 168.193 ms 168.153 ms
....
The result should be like this 结果应该是这样的
223.5.5.5
23.88.2.1
172.246.0.235
....
Thanks a lot for helping me! 非常感谢帮助我！
4 个解决方案
解决方案1
3 已采纳 2016-05-04 15:07:59
this grep line works for your example: 这个grep行适合你的例子：
grep -Po '.*\(\K[^)]*' file
It outputs: 它输出：
223.5.5.5
23.88.2.1
172.246.0.235
207.254.184.97
199.102.95.6
219.158.30.53
219.158.97.17
解决方案2
0 2016-05-04 15:08:34
grep with PCRE ( -P ): 用PCRE（ -P ） grep ：
grep -Po '\(\K[^)]+(?=\))' file.txt
Example: 例：
$ cat file.txt
traceroute to 223.5.5.5 (223.5.5.5), 30 hops max, 60 byte packets
1 1.2-88-23.rdns.scalabledns.com (23.88.2.1) 0.388 ms 0.404 ms 0.415 ms
2 dist01-dc03-core.dc08.lax.ip4.scalabledns.com (172.246.0.235) 0.273 ms 18.825 ms 0.247 ms
3 207.254.184.97 (207.254.184.97) 0.660 ms 0.771 ms 0.834 ms
4 199.102.95.6 (199.102.95.6) 0.836 ms 0.808 ms 0.782 ms
5 219.158.30.53 (219.158.30.53) 192.201 ms 192.186 ms 192.160 ms
6 219.158.97.17 (219.158.97.17) 168.116 ms 168.193 ms 168.153 ms
$ grep -Po '\(\K[^)]+(?=\))' file.txt
223.5.5.5
23.88.2.1
172.246.0.235
207.254.184.97
199.102.95.6
219.158.30.53
219.158.97.17
解决方案3
0 2016-05-04 20:03:38
$ sed 's/.*(\([^)]*\).*/\1/' file
223.5.5.5
23.88.2.1
172.246.0.235
207.254.184.97
199.102.95.6
219.158.30.53
219.158.97.17
解决方案4
0 2016-05-06 09:31:58
One line script in bash (basic knowledge in bash will be enough) http://www.tldp.org/LDP/abs/html/string-manipulation.html bash中的一行脚本（bash中的基础知识就足够了） http://www.tldp.org/LDP/abs/html/string-manipulation.html
# while read l;do expr "$l" : ".*(\(.*\))";done <your_trc_file
223.5.5.5
23.88.2.1
172.246.0.235
207.254.184.97
199.102.95.6
219.158.30.53
219.158.97.17
More explanation: 更多解释：
# while read l;do echo "$l";done <file ## read lines from a file
# # Matching with reg-exp by 'exp :' command
# expr "abcXdefghXXijk" : ".*X.*XX" ## return length
11
# expr "abcXdefghXXijk" : ".*X\(.*\)XX" ## return extract
defgh
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