mailman2lurker: 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/mailman2lurker - from package: lurker

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

Error in other languages:
mailman2lurker: bevel nie gevind nie
mailman2lurker: comandă negăsită
mailman2lurker: comando não encontrado
mailman2lurker: commande introuvable
mailman2lurker: command not found
mailman2lurker: käsku ei ole
mailman2lurker: không tìm thấy lệnh
mailman2lurker: komanda nerasta
mailman2lurker: Kommando nicht gefunden.
mailman2lurker: kommandot finns inte
mailman2lurker: komut yok
mailman2lurker: nie znaleziono polecenia
mailman2lurker: níor aimsíodh an t-ordú
mailman2lurker: no se encontró la orden
mailman2lurker: no s'ha trobat l'ordre
mailman2lurker: opdracht niet gevonden
mailman2lurker: parancs nem található
mailman2lurker: perintah tidak ditemukan
mailman2lurker: príkaz nenájdený
mailman2lurker: příkaz nenalezen
mailman2lurker: команда не найдена
mailman2lurker: командата не е открита
mailman2lurker: 命令找不到
mailman2lurker: コマンドが見つかりません