ard-reset-arduino: 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/ard-reset-arduino - from package: arduino-mk

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

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