sevmgr-config: command not found

Have You tried accessing the binary with the full path?

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/sevmgr-config - from package: sevmgr-devel

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