seivots-summary: 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/seivots-summary - from package: seivot

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