setarch: 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/setarch - from package: util-linux-ng

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

On Debian possible default full paths are:

/usr/bin/setarch - from package: util-linux

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

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