Linux Bash脚本可同时ping通多个主机

Question

I have a text file with list of 500 server names. I need to ping all of them simultaneously instead of one by one in a loop, and put the pingable ones in one file and unpingable ones in another file.

Can I run each ping in background or spawn a new process for each ping? What is the quickest and most efficient way to achieve this?

Answer 1

You can control the parallelism by using xargs :

cat file-of-ips | xargs -n 1 -I ^ -P 50 ping ^

Here we're keeping at most 50 pings going at a time. The ip itself is inserted at the ^ ; you can put arguments before and after.