expeyes-junior: 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/expeyes-junior - from package: expeyes

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

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