rofs: 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/rofs - from package: rofs

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

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