hachoir-urwid: 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/hachoir-urwid - from package: python-hachoir-urwid

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

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