science-financial: 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/science-financial - from package: science-financial

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

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