hv_vss_daemon: 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/sbin/hv_vss_daemon - from package: hypervvssd

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

On Debian possible default full paths are:

/usr/sbin/hv_vss_daemon - from package: hyperv-daemons

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

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