zapping: 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/zapping - from package: zapping

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

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