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Debian & Ubuntu style
date
date --set 1998-11-02 date --set 21:08:0
dpkg-reconfigure tzdata
apt-get install locales dpkg-reconfigure locales locale
debugging:
if the service doesn't start
for some useful error messages:
fail2ban-client -x start
too much cpu / ram usage maybe a problem with /etc/localtime
trace which files are opened / closed all the time by one of the server threads:
strace -f -p <various pids of fail2ban processes
try to delete the database in /var/lib/fail2ban