Cylinder: 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/Cylinder - from package: vtk-examples

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

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