reset-ftrace: 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/reset-ftrace - from package: perf-tools-unstable

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

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