cwutil: 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/cwutil - from package: python2-boto
/usr/bin/cwutil - from package: python-boto

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

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