mkchroot.sagator: 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/sbin/mkchroot.sagator - from package: sagator-core

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