reglookup-recover: 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/reglookup-recover - from package: reglookup

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

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