ipvsadm-save: 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/ipvsadm-save - from package: ipvsadm

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

On Debian possible default full paths are:

/sbin/ipvsadm-save - from package: ipvsadm

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

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