ipa-managed-entries: 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/ipa-managed-entries - from package: ipa-server

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