从文件中替换IP地址 [英] Replace IP Address from file

问题描述

Sample.txt文件：

Sample.txt file:

.........................
some log file entries
some log file entries
some log file entries
some log file entries
This system ip is not found
some log file entries
some log file entries
some log file entries
This system IP is 172.16.80.10
some log file entries
some log file entries
This system IP:172.16.80.10
some log file entries
some log file entries
some log file entries
Hostname::ip-172.16.80.10.ec2.internal
some log file entries
some log file entries
......................

我想从文件而不是主机名替换IP地址，但它也在更改主机名。

I want to replace the IP Address from file not the host name, however it is changing hostname also.

我使用此命令替换IP地址：

I am using this command to replace IP address:

sed s/172.16.80.10/172.16.80.12/g  sample.txt

获得输出

.........................
some log file entries
some log file entries
some log file entries
some log file entries
This system ip is not found
some log file entries
some log file entries
some log file entries
This system IP is 172.16.80.12
some log file entries
some log file entries
This system IP:172.16.80.12
some log file entries
some log file entries
some log file entries
Hostname::ip-172.16.80.12.ec2.internal
some log file entries
some log file entries
......................

（也改变主机名）

期望的输出是

.........................
some log file entries
some log file entries
some log file entries
some log file entries
This system ip is not found
some log file entries
some log file entries
some log file entries
This system IP is 172.16.80.12
some log file entries
some log file entries
This system IP:172.16.80.12
some log file entries
some log file entries
some log file entries
Hostname::ip-172.16.80.10.ec2.internal
some log file entries
some log file entries
......................

代码示例：

while getopts i:h: opt
  do
  case $opt in
  i)
    CurrentLocalIpv4=`curl -s http://169.254.169.254/latest/meta-data/local-ipv4`
    if [[ $OPTARG =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
      sed -i s/"$CurrentLocalIpv4"/"$OPTARG"/g /home/ec2-user/sample.txt
      echo "ip cahnged"
    else
      echo "fail"
    fi
    ;;
    h)
      echo"hostname"  ;;
   esac
 done

推荐答案

使用你的命令，你可以修改如下：

Using your command, you can modify it as follows:

sed 's/172.16.80.10$/172.16.80.12/g' sample.txt

即告诉 sed 您只想更改要更改的IP行以及之后没有更多字符的行（172.16.80.10 $）。

That is, telling sed that you want only change the lines with the IP to be changed and which have no more characters after it (172.16.80.10$).

如果您有IP到在变量（$ CurrentLocalIpv4）中修改，您可以按如下方式编写：

In case of you have the IP to be modified within a variable, ($CurrentLocalIpv4), you may write it as follows:

    sed 's/'$CurrentLocalIpv4'$/172.16.80.12/g' sample.txt

这篇关于从文件中替换IP地址的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！