science-linguistics: 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-linguistics - from package: science-linguistics

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

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