hexdraw: 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/hexdraw - from package: unifont-bin

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

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