pssh package is inside the source epel
When pssh command when used to achieve the secret key based ssh landing between the two machines, because the command is not interactive input yes, but also in the use -A manually enter a password, if we use the batch processing of multiple parameters -h machine, then he would have a chance to enter a password, so if you want to manage multiple machines above password is not the same thing will be wrong! ! !
-E and -o parameter which is relatively common