rednotebook: 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
/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 CentOS possible default full paths are:

/usr/bin/rednotebook - from package: rednotebook

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/rednotebook - from package: rednotebook

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