fosmount: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/fosmount - from package: fosfat

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