z88i1: 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/z88i1 - from package: z88

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

Error in other languages:
z88i1: bevel nie gevind nie
z88i1: comandă negăsită
z88i1: comando não encontrado
z88i1: commande introuvable
z88i1: command not found
z88i1: käsku ei ole
z88i1: không tìm thấy lệnh
z88i1: komanda nerasta
z88i1: Kommando nicht gefunden.
z88i1: kommandot finns inte
z88i1: komut yok
z88i1: nie znaleziono polecenia
z88i1: níor aimsíodh an t-ordú
z88i1: no se encontró la orden
z88i1: no s'ha trobat l'ordre
z88i1: opdracht niet gevonden
z88i1: parancs nem található
z88i1: perintah tidak ditemukan
z88i1: príkaz nenájdený
z88i1: příkaz nenalezen
z88i1: команда не найдена
z88i1: командата не е открита
z88i1: 命令找不到
z88i1: コマンドが見つかりません