Can't create bootable usb on any linux.

[Sekendiz]

As a long time i'm trying a lot of distros. But every time i am getting same problem. the distros that i burned to usb with Unetbooting on Ubuntu or another linux distribution doesn't work.
"this is not a bootable disk, insert a floppy and press enter"
To install a new system i have to find a Windows pc and use Universal Usb Installer. It works well. I don't know what can cause the problem.
Same problem and same solution; windows:
https://bbs.archlinux.org/viewtopic.php?id=181844

[sudodus]

Unetbootin works well for me most of the time. But there are several other tools that work in linux and in Windows. See this link

https://help.ubuntu.com/community/Installation/FromUSBStick

1. Check with md5sum that the download was good. Compare with https://help.ubuntu.com/community/UbuntuHashes

2. Try mkusb (https://help.ubuntu.com/community/mkusb) in linux or Win32 Disk Imager (https://wiki.ubuntu.com/Win32DiskImager/iso2usb) in Windows

[Sekendiz]

Thank you. Unetbooting and Yumi has problem but mkusb works well.