logrotate.conf

# see "man logrotate" for details
# rotate log files daily
daily

# use the syslog group by default, since this is the owning group
# of /var/log/syslog.
su root syslog

# keep 7 days worth of backlogs
rotate 7

# create new (empty) log files after rotating old ones
create

# use date as a suffix of the rotated file
dateext

# compressed log files
compress

# use xz to compress
compresscmd /usr/bin/xz
uncompresscmd /usr/bin/unxz
compressext .xz

# packages drop log rotation information into this directory
include /etc/logrotate.d

# system-specific logs may be also be configured here.