polydot: 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/polydot - from package: emboss

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