lighttpd-angel: 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/sbin/lighttpd-angel - from package: lighttpd

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

On Debian possible default full paths are:

/usr/sbin/lighttpd-angel - from package: lighttpd

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

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