fsvs: 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/fsvs - from package: fsvs

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

On Debian possible default full paths are:

/usr/bin/fsvs - from package: fsvs

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

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