ccmake3: 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/ccmake3 - from package: cmake3

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

Error in other languages:
ccmake3: bevel nie gevind nie
ccmake3: comandă negăsită
ccmake3: comando não encontrado
ccmake3: commande introuvable
ccmake3: command not found
ccmake3: käsku ei ole
ccmake3: không tìm thấy lệnh
ccmake3: komanda nerasta
ccmake3: Kommando nicht gefunden.
ccmake3: kommandot finns inte
ccmake3: komut yok
ccmake3: nie znaleziono polecenia
ccmake3: níor aimsíodh an t-ordú
ccmake3: no se encontró la orden
ccmake3: no s'ha trobat l'ordre
ccmake3: opdracht niet gevonden
ccmake3: parancs nem található
ccmake3: perintah tidak ditemukan
ccmake3: príkaz nenájdený
ccmake3: příkaz nenalezen
ccmake3: команда не найдена
ccmake3: командата не е открита
ccmake3: 命令找不到
ccmake3: コマンドが見つかりません