simple2zoom: 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/simple2zoom - from package: libnet-z3950-simple2zoom-perl

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

Error in other languages:
simple2zoom: bevel nie gevind nie
simple2zoom: comandă negăsită
simple2zoom: comando não encontrado
simple2zoom: commande introuvable
simple2zoom: command not found
simple2zoom: käsku ei ole
simple2zoom: không tìm thấy lệnh
simple2zoom: komanda nerasta
simple2zoom: Kommando nicht gefunden.
simple2zoom: kommandot finns inte
simple2zoom: komut yok
simple2zoom: nie znaleziono polecenia
simple2zoom: níor aimsíodh an t-ordú
simple2zoom: no se encontró la orden
simple2zoom: no s'ha trobat l'ordre
simple2zoom: opdracht niet gevonden
simple2zoom: parancs nem található
simple2zoom: perintah tidak ditemukan
simple2zoom: príkaz nenájdený
simple2zoom: příkaz nenalezen
simple2zoom: команда не найдена
simple2zoom: командата не е открита
simple2zoom: 命令找不到
simple2zoom: コマンドが見つかりません