cmstat: 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
/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 Debian possible default full paths are:

/usr/bin/cmstat - from package: infernal

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