zzxorcopy: 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/zzxorcopy - from package: zziplib-bin

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

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