notes-mobile: 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/notes-mobile - from package: notes-mobile

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

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