avahi-autoipd: 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-autoipd - from package: avahi-autoipd

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

On Debian possible default full paths are:

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

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

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