latex209: 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/latex209 - from package: latex209-bin

You may install the required package with command apt-get install {package}
Error in other languages:
latex209: bevel nie gevind nie
latex209: comandă negăsită
latex209: comando não encontrado
latex209: commande introuvable
latex209: command not found
latex209: käsku ei ole
latex209: không tìm thấy lệnh
latex209: komanda nerasta
latex209: Kommando nicht gefunden.
latex209: kommandot finns inte
latex209: komut yok
latex209: nie znaleziono polecenia
latex209: níor aimsíodh an t-ordú
latex209: no se encontró la orden
latex209: no s'ha trobat l'ordre
latex209: opdracht niet gevonden
latex209: parancs nem található
latex209: perintah tidak ditemukan
latex209: príkaz nenájdený
latex209: příkaz nenalezen
latex209: команда не найдена
latex209: командата не е открита
latex209: 命令找不到
latex209: コマンドが見つかりません