designate-sink: 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-sink - from package: designate-common

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

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