setlayout: 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/setlayout - from package: openbox

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

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