z88n: 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/z88n - from package: z88

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

Error in other languages:
z88n: bevel nie gevind nie
z88n: comandă negăsită
z88n: comando não encontrado
z88n: commande introuvable
z88n: command not found
z88n: käsku ei ole
z88n: không tìm thấy lệnh
z88n: komanda nerasta
z88n: Kommando nicht gefunden.
z88n: kommandot finns inte
z88n: komut yok
z88n: nie znaleziono polecenia
z88n: níor aimsíodh an t-ordú
z88n: no se encontró la orden
z88n: no s'ha trobat l'ordre
z88n: opdracht niet gevonden
z88n: parancs nem található
z88n: perintah tidak ditemukan
z88n: príkaz nenájdený
z88n: příkaz nenalezen
z88n: команда не найдена
z88n: командата не е открита
z88n: 命令找不到
z88n: コマンドが見つかりません