cvm-checkpassword: 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 Debian possible default full paths are:

/usr/bin/cvm-checkpassword - from package: cvm

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

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