sphinx_cont_adseg: 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_cont_adseg - from package: sphinxbase-utils

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