whups-obliterate: 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/whups-obliterate - from package: php-horde-whups

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

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