avahi-dnsconfd: 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/avahi-dnsconfd - from package: avahi-dnsconfd

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

On Debian possible default full paths are:

/usr/sbin/avahi-dnsconfd - from package: avahi-dnsconfd

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

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