vadm: 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/vadm - from package: atfs

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