starcluster: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/starcluster - from package: StarCluster

You may install the required package with command yum install {package}

Error in other languages:
starcluster: bevel nie gevind nie
starcluster: comandă negăsită
starcluster: comando não encontrado
starcluster: commande introuvable
starcluster: command not found
starcluster: käsku ei ole
starcluster: không tìm thấy lệnh
starcluster: komanda nerasta
starcluster: Kommando nicht gefunden.
starcluster: kommandot finns inte
starcluster: komut yok
starcluster: nie znaleziono polecenia
starcluster: níor aimsíodh an t-ordú
starcluster: no se encontró la orden
starcluster: no s'ha trobat l'ordre
starcluster: opdracht niet gevonden
starcluster: parancs nem található
starcluster: perintah tidak ditemukan
starcluster: príkaz nenájdený
starcluster: příkaz nenalezen
starcluster: команда не найдена
starcluster: командата не е открита
starcluster: 命令找不到
starcluster: コマンドが見つかりません