Internet Download Manager is not available for Linux but there are plenty of alternatives that runs on Linux with similar functionality. The best Linux Download Manager alternative is Xtreme Download Manager, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Internet Download Manager and loads of them are Download Managers available for Linux so hopefully you can find a suitable replacement. Other interesting Linux Download Manager alternatives to Internet Download Manager are Free Download Manager, JDownloader, AB Download Manager and uGet.
I think that XDM is a very good alternative to IDM because it allows you to download videos on many sites other than YouTube (ENI platform, LinkedIn for example) like IDM does. On the other hand, IDM sometimes preserves the file name while XDM does not, which is annoying if you download a series of videos because you have to rename everything by hand. Translation FR OK.