rosegarden: 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/rosegarden - from package: rosegarden

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

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