ceilometer: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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 Debian possible default full paths are:

/usr/bin/ceilometer - from package: python-ceilometerclient

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