Cita:
Iniciado por HostOnePlus 
Ubuntu es opensource, no hay problema.
No se que tiene que ver eso, Firefox es opensource y el logo tiene copyright -.-
Ubuntu tambien
http://www.ubuntu.com/aboutus/trademarkpolicy Cita: Restricted use that requires a trademark license
Permission from us is necessary to use any of the Trademarks under any circumstances other than those specifically permitted above. These include:
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Any commercial use.
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Use on or in relation to a software product that includes or is built on top of a product supplied by us, if there is any commercial intent associated with that product.
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Use in a domain name or URL.
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Use for merchandising purposes, e.g. on t-shirts and the like.
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Use of a name which includes the letters BUNTU in relation to computer hardware or software.
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Services relating to any of the above.
Aunque honestamente, no creo que tengas problemas, a menos que te pongas a vender las playeras y te hagas conocido con eso -.-