sdbadmin: 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/sdbadmin - from package: python2-boto
/usr/bin/sdbadmin - from package: python-boto

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