empty: command not found

Have You tried accessing the binary with the full path?

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/empty - from package: empty-expect
/usr/share/perl5/auto/share/dist/Poet/generate.skel/bin/tmp/EMPTY - from package: libpoet-perl

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