随手写1

去头去尾
[root@lavm-x04s4kv7q3 ~]# ifconfig eth0
eth0: flags=4163 mtu 1450
inet 172.16.0.3 netmask 255.255.0.0 broadcast 172.16.255.255
inet6 fe80::f816:3eff:fe99:80ac prefixlen 64 scopeid 0x20
ether fa:16:3e:99:80:ac txqueuelen 1000 (Ethernet)
RX packets 7245055 bytes 1739454683 (1.6 GiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8287655 bytes 2990507713 (2.7 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

ifconfig eth0 | sed “2p” -n |sed “s/^.inet/ /” | sed “s/net.$/ /”

[root@lavm-x04s4kv7q3 ~]# ifconfig eth0 | sed “2p” -n |sed “s/^.inet/ /” | sed “s/net.$/ /”
172.16.0.3

cat /var/log/secure | awk ‘/^.(F|f)ailed./

过滤ip地址
cat /var/log/secure | awk ‘/^.(F|f)ailed./’|egrep ” ([0-9]+.){3}[0-9]+” -o

from 218.92.0.94
from 218.92.0.94
from 218.92.0.94
from 20.206.107.214
from 218.92.0.94
from 218.92.0.94
from 218.92.0.94
from 20.206.107.214
from 218.92.0.94
from 218.92.0.94
from 218.92.0.94
from 20.206.107.214
from 218.92.0.94
from 218.92.0.94
from 218.92.0.94
from 218.92.0.94

图片[1]-随手写1-晴天生活分享日志
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