avctest: 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/avctest - from package: avce00

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

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