[TYPO3-linux] Backend login error

[Bertrand Chauvet]

I found my mistake.
I was wrong in typing new value in [cookieDomain]  (via the install tool).
I had just written there 'mydomain.com', this does not seem to work this
way. I guess it should be '.mydomain.com' or another syntax...

Anyway, I've just left this field blank like it was by default, and I have
no more issue, I can login in to back end.

Special thanks to Klaus for driving me towards the coockie fixing direction
:-)

Cheers
Bertrand