donutsd: 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 CentOS possible default full paths are:

/usr/bin/donutsd - from package: dnssec-tools

You may install the required package with command yum install {package}

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