Emergency, cannot boot 4.10

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Greetings,

My 4.10 server is halting during the boot process because the 
kern.maxfiles entry in /etc/sysctl.conf is corrupted or wrong (though I 
have not changed it in some time).  What I want to do is simply remove 
that entry from the sysctl.conf file, but I cannot even get into the system.

I have a presentation later today based on some of the work I've done on 
that server -- if someone could clue me in on how to best get in to fix 
that file, I'd really appreciate it.  I've tried the Brazilian LiveCD 
ISO, without success -- the keyboard mappings are for Portugeuse, not 
English.

-- Stephen.