s3dvt: 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 Debian possible default full paths are:

/usr/bin/s3dvt - from package: s3dvt

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

Error in other languages:
s3dvt: bevel nie gevind nie
s3dvt: comandă negăsită
s3dvt: comando não encontrado
s3dvt: commande introuvable
s3dvt: command not found
s3dvt: käsku ei ole
s3dvt: không tìm thấy lệnh
s3dvt: komanda nerasta
s3dvt: Kommando nicht gefunden.
s3dvt: kommandot finns inte
s3dvt: komut yok
s3dvt: nie znaleziono polecenia
s3dvt: níor aimsíodh an t-ordú
s3dvt: no se encontró la orden
s3dvt: no s'ha trobat l'ordre
s3dvt: opdracht niet gevonden
s3dvt: parancs nem található
s3dvt: perintah tidak ditemukan
s3dvt: príkaz nenájdený
s3dvt: příkaz nenalezen
s3dvt: команда не найдена
s3dvt: командата не е открита
s3dvt: 命令找不到
s3dvt: コマンドが見つかりません