hpcups-update-ppds: 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/hpcups-update-ppds - from package: hpijs

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

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