idba_hybrid: 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/idba_hybrid - from package: idba

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

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