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

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

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