sed和awk的一些命令操作-优快云博客

本文链接：https://blog.youkuaiyun.com/diyiday/article/details/100145876

本文详细介绍了在Linux环境下如何使用ifconfig命令进行网络配置，包括去除空格、显示特定网络接口信息及行数的方法，适合于希望深入了解Linux网络管理的读者。

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去除空格

cat a.txt | sed 's/ //g'

显示某一行下面的所有内容
源文件

br-73908aa622e3: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.18.0.1  netmask 255.255.0.0  broadcast 172.18.255.255
docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:c5:14:e8:db  txqueuelen 0  (Ethernet)
        RX packets 159340  bytes 12148863 (11.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 110088  bytes 15332872 (14.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

显示docker0后面的的所有行数

ifconfig |sed -n '/docker0/,$p'

[root@aliyun ~]# ifconfig |sed -n '/docker0/,$p' 
docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:c5:14:e8:db  txqueuelen 0  (Ethernet)
        RX packets 159340  bytes 12148863 (11.5 MiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 110088  bytes 15332872 (14.6 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
[root@aliyun ~]#

显示第四行内容

ifconfig |sed -n '4p' |awk '{print $5}'

awk叠加

lag=bash /wls/apache/kafka/kafka/bin/kafka-consumer-groups.sh --bootstrap-server 196.168.1.1:9876--describe --group $group | grep -v 'LAG' | awk -F ' ' '{print $5}' | awk '{sum+=$1} END {if(sum>100000) print sum}'