dvorak7min: 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/dvorak7min - from package: dvorak7min

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

Error in other languages:
dvorak7min: bevel nie gevind nie
dvorak7min: comandă negăsită
dvorak7min: comando não encontrado
dvorak7min: commande introuvable
dvorak7min: command not found
dvorak7min: käsku ei ole
dvorak7min: không tìm thấy lệnh
dvorak7min: komanda nerasta
dvorak7min: Kommando nicht gefunden.
dvorak7min: kommandot finns inte
dvorak7min: komut yok
dvorak7min: nie znaleziono polecenia
dvorak7min: níor aimsíodh an t-ordú
dvorak7min: no se encontró la orden
dvorak7min: no s'ha trobat l'ordre
dvorak7min: opdracht niet gevonden
dvorak7min: parancs nem található
dvorak7min: perintah tidak ditemukan
dvorak7min: príkaz nenájdený
dvorak7min: příkaz nenalezen
dvorak7min: команда не найдена
dvorak7min: командата не е открита
dvorak7min: 命令找不到
dvorak7min: コマンドが見つかりません