bash 脚本从文本文件读取/ping ip 地址列表，然后将结果写入另一个文件？
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bash script to read/ping a list of ip addresses from a text file and then write the results to another file?
提问by user2133606
I have a text file with a lists of IP addresses called address.txt which contains the following
我有一个文本文件，其中包含一个名为 address.txt 的 IP 地址列表，其中包含以下内容
172.26.26.1 wlan01
172.26.27.65 wlan02
172.26.28.180 wlan03
I need to write a bash script that reads the only IP addresses, ping them and output to a another text file to something like this:
我需要编写一个 bash 脚本来读取唯一的 IP 地址，ping 它们并输出到另一个文本文件，如下所示：
172.26.26.1 IS UP
172.26.27.65 IS DOWN
172.26.28.180 IS DOWN
172.26.26.1 已上线
172.26.27.65 已关闭
172.26.28.180 已关闭
I am fairly new to bash scripting so I am not sure where to start with this. Any help would be much appreciated.
我对 bash 脚本很陌生，所以我不确定从哪里开始。任何帮助将非常感激。
回答by janos
In Linux this would work:
在 Linux 中，这会起作用：
awk '{print }' < address.txt | while read ip; do ping -c1 $ip >/dev/null 2>&1 && echo $ip IS UP || echo $ip IS DOWN; done
I don't have a cygwin now to test, but it should work there too.
我现在没有要测试的 cygwin，但它也应该在那里工作。
Explanation:
解释：
- With
awkwe get the first column from the input file and pipe it into a loop - We send a single
pingto$ip, and redirect standard output and standard error to/dev/nullso it doesn't pollute our output - If
pingis successful, the command after&&is executed:echo $ip IS UP - If
pingfails, the command after||is executed:echo $ip IS DOWN
- 随着
awk我们从输入文件和管道它的第一列成一个圈 - 我们发送一个
pingto$ip，并将标准输出和标准错误重定向到，/dev/null这样它就不会污染我们的输出 - 如果
ping成功，则执行之后的命令&&：echo $ip IS UP - 如果
ping失败，则执行 after 命令||：echo $ip IS DOWN
Somewhat more readable, expanded format, to put in a script:
放在脚本中的更具可读性的扩展格式：
#!/bin/sh
awk '{print }' < address.txt | while read ip; do
if ping -c1 $ip >/dev/null 2>&1; then
echo $ip IS UP
else
echo $ip IS DOWN
fi
done
