designate-manage: 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/designate-manage - from package: designate-common

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

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