ipmiping: 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/sbin/ipmiping - from package: freeipmi

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

On Debian possible default full paths are:

/usr/sbin/ipmiping - from package: freeipmi-tools

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

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