nodeset: 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/nodeset - from package: clustershell

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

On Debian possible default full paths are:

/usr/bin/nodeset - from package: clustershell

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

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