trace-summary: 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/trace-summary - from package: trace-summary

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

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