scandeps: 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/scandeps - from package: libmodule-scandeps-perl

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

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