dnaindex: 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/dnaindex - from package: anfo

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

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