avr-elfedit: 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/avr-elfedit - from package: binutils-avr

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