gnome_wave_cleaner: 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/gnome_wave_cleaner - from package: gwc

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

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