pawX11: 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/pawX11 - from package: paw
/usr/lib64/cernlib/2006-g77/bin/pawX11 - from package: paw

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

On Debian possible default full paths are:

/usr/bin/pawX11 - from package: paw

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

Error in other languages:
pawX11: bevel nie gevind nie
pawX11: comandă negăsită
pawX11: comando não encontrado
pawX11: commande introuvable
pawX11: command not found
pawX11: käsku ei ole
pawX11: không tìm thấy lệnh
pawX11: komanda nerasta
pawX11: Kommando nicht gefunden.
pawX11: kommandot finns inte
pawX11: komut yok
pawX11: nie znaleziono polecenia
pawX11: níor aimsíodh an t-ordú
pawX11: no se encontró la orden
pawX11: no s'ha trobat l'ordre
pawX11: opdracht niet gevonden
pawX11: parancs nem található
pawX11: perintah tidak ditemukan
pawX11: príkaz nenájdený
pawX11: příkaz nenalezen
pawX11: команда не найдена
pawX11: командата не е открита
pawX11: 命令找不到
pawX11: コマンドが見つかりません