sapphire: 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/sapphire - from package: sapphire

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