eclipseemu: 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/eclipseemu - from package: simh

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

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