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

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

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