winbindd: 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/winbindd - from package: samba4-winbind
/usr/sbin/winbindd - from package: samba-winbind

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

On Debian possible default full paths are:

/usr/sbin/winbindd - from package: winbind

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

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