hard20 pts · first answer countslinuxbashssh

Loop stops after the first host

This loop should run uptime on every host in hosts.txt, but it only reaches the first one. Why?

while read -r h; do
  ssh "$h" uptime
done < hosts.txt

A.read -r stops after the first line by designB.ssh reads the loop's stdin and consumes the other host namesC.ssh closes the file descriptor of hosts.txt on exitD.The loop needs a semicolon after uptime

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Loop stops after the first host

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