tmda-check-address: 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 CentOS possible default full paths are:

/usr/bin/tmda-check-address - from package: tmda

You may install the required package with command yum install {package}

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