ceph_mon_store_converter: 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/ceph_mon_store_converter - from package: ceph

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

On Debian possible default full paths are:

/usr/bin/ceph_mon_store_converter - from package: ceph

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

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