autoscan: 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 CentOS possible default full paths are:

/usr/bin/autoscan - from package: autoconf

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/autoscan - from package: autoconf

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

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