commons-launcher.jar: 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/share/doc/libcommons-launcher-java/examples/bin/commons-launcher.jar - from package: libcommons-launcher-java

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

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