pumount: 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/pumount - from package: pmount

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

On Debian possible default full paths are:

/usr/bin/pumount - from package: pmount

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

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