cat 6.sh
for i in $(< try.txt); do
  user=$(echo $i | cut -d ":" -f 1)
  pass=$(echo $i | cut -d ":" -f 2)
  ip=$(echo $i | cut -d ":" -f 3)
  sshpass -p "${pass}" ssh "${user}@{ip}" -o StrictHostKeyChecking=no "my commands &"
done

./6.sh
ssh: {ip}: Name or service not known
ssh: {ip}: Name or service not known
ssh: {ip}: Name or service not known
ssh: {ip}: Name or service not known
ssh: {ip}: Name or service not known
ssh: {ip}: Name or service not known