volinfo: 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/VolInfo - from package: edk2-tools

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

On Debian possible default full paths are:

/usr/sbin/volinfo - from package: openafs-fileserver

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

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