gpvc: 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/gpvc - from package: gputils

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

On Debian possible default full paths are:

/usr/bin/gpvc - from package: gputils

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

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