setfacl: 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/bin/setfacl - from package: acl

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

On Debian possible default full paths are:

/usr/bin/setfacl - from package: acl
/bin/setfacl - from package: acl

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

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