retrace-server-interact: 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/retrace-server-interact - from package: retrace-server

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

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