Cone5: 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/Cone5 - from package: vtk-examples

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

Error in other languages:
Cone5: bevel nie gevind nie
Cone5: comandă negăsită
Cone5: comando não encontrado
Cone5: commande introuvable
Cone5: command not found
Cone5: käsku ei ole
Cone5: không tìm thấy lệnh
Cone5: komanda nerasta
Cone5: Kommando nicht gefunden.
Cone5: kommandot finns inte
Cone5: komut yok
Cone5: nie znaleziono polecenia
Cone5: níor aimsíodh an t-ordú
Cone5: no se encontró la orden
Cone5: no s'ha trobat l'ordre
Cone5: opdracht niet gevonden
Cone5: parancs nem található
Cone5: perintah tidak ditemukan
Cone5: príkaz nenájdený
Cone5: příkaz nenalezen
Cone5: команда не найдена
Cone5: командата не е открита
Cone5: 命令找不到
Cone5: コマンドが見つかりません