science-numericalcomputation: 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-numericalcomputation - from package: science-numericalcomputation

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

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