cmake28: 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/cmake28 - from package: cmake28

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

Error in other languages:
cmake28: bevel nie gevind nie
cmake28: comandă negăsită
cmake28: comando não encontrado
cmake28: commande introuvable
cmake28: command not found
cmake28: käsku ei ole
cmake28: không tìm thấy lệnh
cmake28: komanda nerasta
cmake28: Kommando nicht gefunden.
cmake28: kommandot finns inte
cmake28: komut yok
cmake28: nie znaleziono polecenia
cmake28: níor aimsíodh an t-ordú
cmake28: no se encontró la orden
cmake28: no s'ha trobat l'ordre
cmake28: opdracht niet gevonden
cmake28: parancs nem található
cmake28: perintah tidak ditemukan
cmake28: príkaz nenájdený
cmake28: příkaz nenalezen
cmake28: команда не найдена
cmake28: командата не е открита
cmake28: 命令找不到
cmake28: コマンドが見つかりません