runzeo: 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/bin/runzeo - from package: python-zodb
/usr/lib/zope2.13/bin/runzeo - from package: zope2.13

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

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