ctdbd: 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/sbin/ctdbd - from package: ctdb

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

On Debian possible default full paths are:

/usr/sbin/ctdbd - from package: ctdb

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

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