whodepends: 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/whodepends - from package: devscripts

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

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