anytun-config: 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/anytun-config - from package: anytun

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