tracediff: 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 Debian possible default full paths are:

/usr/bin/tracediff - from package: libtrace-tools
/usr/lib/staden/bin/tracediff - from package: staden

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

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