cver: 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/cver - from package: gplcver

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

On Debian possible default full paths are:

/usr/bin/cver - from package: gplcver

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

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