wwwerrs: 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 Debian possible default full paths are:

/usr/sbin/wwwerrs - from package: wwwstat

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

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