moosic: 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/moosic - from package: moosic

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

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