mswatch: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/mswatch - from package: mswatch

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