tracd: 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/sbin/tracd - from package: trac10
/usr/sbin/tracd - from package: trac

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

On Debian possible default full paths are:

/usr/bin/tracd - from package: trac

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

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