xmount: 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/xmount - from package: xmount

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

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