d-feet: 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/d-feet - from package: d-feet

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

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