decode_tm6000: 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/decode_tm6000 - from package: v4l-utils-devel-tools

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

On Debian possible default full paths are:

/usr/bin/decode_tm6000 - from package: v4l-utils

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

Error in other languages:
decode_tm6000: bevel nie gevind nie
decode_tm6000: comandă negăsită
decode_tm6000: comando não encontrado
decode_tm6000: commande introuvable
decode_tm6000: command not found
decode_tm6000: käsku ei ole
decode_tm6000: không tìm thấy lệnh
decode_tm6000: komanda nerasta
decode_tm6000: Kommando nicht gefunden.
decode_tm6000: kommandot finns inte
decode_tm6000: komut yok
decode_tm6000: nie znaleziono polecenia
decode_tm6000: níor aimsíodh an t-ordú
decode_tm6000: no se encontró la orden
decode_tm6000: no s'ha trobat l'ordre
decode_tm6000: opdracht niet gevonden
decode_tm6000: parancs nem található
decode_tm6000: perintah tidak ditemukan
decode_tm6000: príkaz nenájdený
decode_tm6000: příkaz nenalezen
decode_tm6000: команда не найдена
decode_tm6000: командата не е открита
decode_tm6000: 命令找不到
decode_tm6000: コマンドが見つかりません