cpu_sup: 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/lib64/erlang/lib/os_mon-2.2.7/priv/bin/cpu_sup - from package: erlang-os_mon

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

On Debian possible default full paths are:

/usr/lib/debug/usr/lib/erlang/lib/os_mon-2.3/priv/bin/cpu_sup - from package: erlang-dbg
/usr/lib/erlang/lib/os_mon-2.3/priv/bin/cpu_sup - from package: erlang-os-mon

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

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