sync_httpsearch: 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/sync_httpsearch - from package: libruli-bin

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

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