update-gnucash-gconf: 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 CentOS possible default full paths are:

/usr/bin/update-gnucash-gconf - from package: gnucash

You may install the required package with command yum install {package}

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