science-logic: 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-logic - from package: science-logic

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

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