cygwin - bash script to read/ping a list of ip addresses from a text file and then write the results to another file? -


i have text file lists of ip addresses called address.txt contains following 

172.26.26.1   wlan01  172.26.27.65    wlan02  172.26.28.180    wlan03

i need write bash script reads ip addresses, ping them , output text file this:

172.26.26.1 up

172.26.27.65 down

172.26.28.180 down

i new bash scripting not sure start this. appreciated.

in linux work:

awk '{print $1}' < address.txt | while read ip; ping -c1 $ip >/dev/null 2>&1 && echo $ip || echo $ip down; done

i don't have cygwin test, should work there too.

explanation:

  • with awk first column input file , pipe loop
  • we send single ping $ip, , redirect standard output , standard error /dev/null doesn't pollute our output
  • if ping successful, command after && executed: echo $ip up
  • if ping fails, command after || executed: echo $ip down

somewhat more readable, expanded format, put in script:

#!/bin/sh awk '{print $1}' < address.txt | while read ip;     if ping -c1 $ip >/dev/null 2>&1;         echo $ip     else         echo $ip down     fi done

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