On each of your hosts:
yum [for RHEL or CentOS]
zypper [for SLES]
rpm
scp [for multiple node installs]
curl
wget
unzip
tar
pdsh [for multiple node installs over many hosts]
On each of your hosts:
yum [for RHEL or CentOS]
zypper [for SLES]
rpm
scp [for multiple node installs]
curl
wget
unzip
tar
pdsh [for multiple node installs over many hosts]