magnet-link: 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/magnet-link - from package: rhash

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

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