disdvi: 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/disdvi - from package: texlive-binaries

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

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