spine: 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

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/sbin/spine - from package: cacti-spine

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