kcbench: 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/kcbench - from package: kcbench

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

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