sphinx_jsgf2fsg: 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

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/sphinx_jsgf2fsg - from package: sphinxbase-utils

You may install the required package with command apt-get install {package}
Error in other languages:
sphinx_jsgf2fsg: bevel nie gevind nie
sphinx_jsgf2fsg: comandă negăsită
sphinx_jsgf2fsg: comando não encontrado
sphinx_jsgf2fsg: commande introuvable
sphinx_jsgf2fsg: command not found
sphinx_jsgf2fsg: käsku ei ole
sphinx_jsgf2fsg: không tìm thấy lệnh
sphinx_jsgf2fsg: komanda nerasta
sphinx_jsgf2fsg: Kommando nicht gefunden.
sphinx_jsgf2fsg: kommandot finns inte
sphinx_jsgf2fsg: komut yok
sphinx_jsgf2fsg: nie znaleziono polecenia
sphinx_jsgf2fsg: níor aimsíodh an t-ordú
sphinx_jsgf2fsg: no se encontró la orden
sphinx_jsgf2fsg: no s'ha trobat l'ordre
sphinx_jsgf2fsg: opdracht niet gevonden
sphinx_jsgf2fsg: parancs nem található
sphinx_jsgf2fsg: perintah tidak ditemukan
sphinx_jsgf2fsg: príkaz nenájdený
sphinx_jsgf2fsg: příkaz nenalezen
sphinx_jsgf2fsg: команда не найдена
sphinx_jsgf2fsg: командата не е открита
sphinx_jsgf2fsg: 命令找不到
sphinx_jsgf2fsg: コマンドが見つかりません