gv-update-userconfig: 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/gv-update-userconfig - from package: gv

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

On Debian possible default full paths are:

/usr/bin/gv-update-userconfig - from package: gv

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

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