miniterm.py: 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/miniterm.py - from package: python-serial

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

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