tmda-inject: 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-inject - from package: tmda

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

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