everups: 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:

/sbin/everups - from package: nut

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