asistant: 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/asistant - from package: asis-programs

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

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