entangle: 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/entangle - from package: entangle

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