使用awk 取 ip 地址

joies

我使用nmap 扫描IP段后，得到下面的结果

Starting nmap 3.70 ( http://www.insecure.org/nmap/ ) at 2008-12-23 22:17 CST
Interesting ports on 172.22.41.1:
PORT   STATE SERVICE
22/tcp open  ssh

Interesting ports on 172.22.41.2:
PORT   STATE SERVICE
22/tcp open  ssh

Interesting ports on 172.22.41.3:
PORT   STATE SERVICE
22/tcp open  ssh

Interesting ports on 172.22.41.4:
PORT   STATE SERVICE
22/tcp open  ssh

Interesting ports on 172.22.41.5:
PORT   STATE SERVICE
22/tcp open  ssh

Nmap run completed -- 5 IP addresses (5 hosts up) scanned in 0.134 seconds

要求：使用awk 将IP地址取出来，用一个awk来做，不希望用 grep *** | awk ***| awk *** 这样的形式来做，只用一次 awk  就可以将IP取出来，不知有没有什么好的办法？

[ 本帖最后由 joies 于 2008-12-23 22:25 编辑 ]

ly5066113

awk -F '[ :]+' '//{print $(NF-1)}'

biglazybug

awk --posix -RS="" '{for(i=1;i<=NF;i++){if($i~/^[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}.[0-9]{1,3}:/) print $i}}' urfile

biglazybug

嘿嘿 脑袋瓜有点太呆板了

爱知

awk -F: 'NR != 1{print $1}' RS="ports on" ufile

moartel

awk 'gsub ( /:/,"") && /^Inter/ {print $4}' urfile

walkerxk

grep -oE "([0-9]{1,3}\.){3}[0-9]{1,3}"
MS我的命令最短。
格式匹配是正则的强项，我觉得不应该用awk，不知道tim同意不同意我的观点。

biglazybug

呵呵 恩 但是人家指明要用awk嘛

zhangshebao

bash-3.2$ echo "Starting nmap 3.70 ( http://www.insecure.org/nmap/ ) at 2008-12
-23 22:17 CST
Interesting ports on 172.22.41.1:
PORT   STATE SERVICE
22/tcp open  ssh
Interesting ports on 172.22.41.2:
PORT   STATE SERVICE
22/tcp open  ssh
Interesting ports on 172.22.41.3:
PORT   STATE SERVICE
22/tcp open  ssh
Interesting ports on 172.22.41.4:
PORT   STATE SERVICE
22/tcp open  ssh
Interesting ports on 172.22.41.5:
PORT   STATE SERVICE
22/tcp open  ssh
Nmap run completed -- 5 IP addresses (5 hosts up) scanned in 0.134 seconds
"|gawk --re-interval 'match($0,/(([0-9]+\.){3}[0-9]+)/){print substr($0,RSTART,RLENGTH)}'
172.22.41.1
172.22.41.2
172.22.41.3
172.22.41.4
172.22.41.5
bash-3.2$

walkerxk

原帖由 biglazybug 于 2008-12-23 23:19 发表
呵呵 恩 但是人家指明要用awk嘛

我向来喜欢砸AWK的场子