umegaya-adm: command not found

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 Debian possible default full paths are:

/usr/bin/umegaya-adm - from package: umegaya

You may install the required package with command apt-get install {package}

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