vlog: command not found

Have You tried accessing the binary with the full path?

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 Debian possible default full paths are:

/usr/bin/vlog - from package: atfs

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