cmsd: 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/cmsd - from package: xrootd-server

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

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