websec: command not found

Have You tried accessing the binary with the full path?

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/websec - from package: websec

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