pvmd: 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 Debian possible default full paths are:

/usr/bin/pvmd - from package: pvm

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

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