pybit-watcher: 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/pybit-watcher - from package: pybit-watcher

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

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