I want to look through my apache access log backwards. How can I do that on Ubuntu?
First You may configure your /etc/logrotate.conf, man logrotate for more information. You can specify some infomations : If you want to rotate log files weekly and keep 4 weeks worth of backlogs
weekly rotate 4
After you can browse you log 4 weeks ago, using you favorite viewer, like awstat, tail -f ...
If a rotation is made, look into the configuration of the rotation. If a rotation is made every 4 days, that means that you will have to look on the archive made 4 days ago in order to read the period of time log.
You will find in the log directory tar.gz files (which are archives of the log) like samba.1.tar.gz, samba.2.tar.gz simply extract the file you want
tar -zxvf samba.2.tar.gz
and you will be able to read old logs.