Question

A DevOps engineer needs a Bash script to process a file named servers.txt that contains one hostname per line, including some lines with embedded spaces and trailing whitespace. Each hostname must be read exactly as written and passed to a ping check. Which loop construct correctly reads the file line by line while preserving leading/trailing whitespace and avoiding word splitting?

Accepted Answer

while IFS= read -r line; do ping -c1 "$line"; done < servers.txt

Answer

for line in $(cat servers.txt); do ping -c1 $line; done

Answer

while read line; do ping -c1 $line; done < servers.txt

Answer

cat servers.txt | for line; do ping -c1 "$line"; done