newsyslog is a program used in FreeBSD servers to rotate log files.

Many programs write to log files, this will grow over time and system administrator have to delete these files. newsyslog help system administarors to rotate log files.

In cpanel FreeBSD servers, exim mail server log is stored in /var/log/exim folder. These files are not rotated by default by cpanel. On my server, i just deleted a log file of size 1 GB. On Linux Cpanel servers, you don't have to do this yourself, cpanel will setup everything properly. On FreeBSD you have to rotate log your self.

To rotate exim and apache logs in cpanel servers, add following content to end of /etc/newsyslog.conf file.

            # vi /etc/newsyslog.conf
            /var/log/exim/mainlog                   600  4     *    @T00  B
            /var/log/exim/paniclog                  600  4     *    @T00  B
            /var/log/exim/rejectlog                 600  4     *    @T00  B
            /usr/local/apache/logs/access_log       600  4     *    @T00  B
            /usr/local/apache/logs/error_log        600  4     *    @T00  B
            /usr/local/apache/logs/suexec_log       600  4     *    @T00  B