dbxfasta: 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/dbxfasta - from package: emboss

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