dahdi_genconf: 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 CentOS possible default full paths are:

/usr/sbin/dahdi_genconf - from package: dahdi-tools

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/sbin/dahdi_genconf - from package: dahdi

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

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