javaws.itweb: 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/javaws.itweb - from package: icedtea-web

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

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