tcpliveplay: 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/tcpliveplay - from package: tcpreplay

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

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