codeaster-gui: 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/codeaster-gui - from package: code-aster-gui

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