dh_components: 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/dh_components - from package: pkg-components

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

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