clustat: 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/sbin/clustat - from package: rgmanager

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

On Debian possible default full paths are:

/usr/sbin/clustat - from package: rgmanager

You may install the required package with command apt-get install {package}

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