rox-filer: 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
/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/rox-filer - from package: rox-filer

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