arptables-restore: 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:

/sbin/arptables-restore - from package: arptables_jf

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

On Debian possible default full paths are:

/sbin/arptables-restore - from package: arptables

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

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