cupsd: 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/cupsd - from package: cups

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

On Debian possible default full paths are:

/usr/sbin/cupsd - from package: cups-daemon

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

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