threadscope: 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/threadscope - from package: threadscope

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

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