sputnik: 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/sputnik - from package: sputnik

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