paps: 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/paps - from package: paps

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

On Debian possible default full paths are:

/usr/bin/paps - from package: paps

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

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