lpc.cups: 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/lpc.cups - from package: cups

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

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