[root@localhost conf]# pwd
/usr/local/tomcat/conf
[root@localhost conf]# cp logging.properties logging.propertiesbak
[root@localhost conf]# vim logging.properties
 25 1catalina.org.apache.juli.FileHandler.level = FINE
 26 1catalina.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
 27 1catalina.org.apache.juli.FileHandler.prefix = catalina.

SEVERE (highest value) > WARNING > INFO > CONFIG > FINE > FINER > FINEST (lowest value)

[root@localhost src]# rpm -qa |grep cronolog
[root@localhost src]# tar zxvf cronolog-1.6.2.tar.gz 
[root@localhost src]# cd cronolog-1.6.2
[root@localhost cronolog-1.6.2]# ./configure 
[root@localhost cronolog-1.6.2]# make && make install
[root@localhost cronolog-1.6.2]# which cronolog
/usr/local/sbin/cronolog
[root@localhost cronolog-1.6.2]#

[root@localhost cronolog-1.6.2]# cp /usr/local/tomcat/bin/catalina.sh /usr/local/tomcat/bin/catalina.shbak
[root@localhost cronolog-1.6.2]# vim /usr/local/tomcat/bin/catalina.sh
182 if [ -z "$CATALINA_OUT" ] ; then
183 # CATALINA_OUT="$CATALINA_BASE"/logs/catalina.out
184  CATALINA_OUT="$CATALINA_BASE"/logs/catalina.%Y-%m-%d.out
185 fi
......
355 # touch "$CATALINA_OUT"
......
363    -Djava.security.manager 364    -Djava.security.policy=="$CATALINA_BASE"/conf/catalina.policy 365    -Dcatalina.base="$CATALINA_BASE" 366    -Dcatalina.home="$CATALINA_HOME" 367    -Djava.io.tmpdir="$CATALINA_TMPDIR" 368 #   org.apache.catalina.startup.Bootstrap "$@" start 369 #    "$CATALINA_OUT" 2>&1 &
370   org.apache.catalina.startup.Bootstrap "$@" start 2>&1 \ 
371   | /usr/local/sbin/cronolog "$CATALINA_OUT"  /dev/null &
372 
373  else
374   "$_RUNJAVA" "$LOGGING_CONFIG" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS 375    -Djava.endorsed.dirs="$JAVA_ENDORSED_DIRS" -classpath "$CLASSPATH" 376    -Dcatalina.base="$CATALINA_BASE" 377    -Dcatalina.home="$CATALINA_HOME" 378    -Djava.io.tmpdir="$CATALINA_TMPDIR" 379 #   org.apache.catalina.startup.Bootstrap "$@" start 380 #    "$CATALINA_OUT" 2>&1 &
381    org.apache.catalina.startup.Bootstrap "$@" start 2>&1 \ 
382    | /usr/local/sbin/cronolog "$CATALINA_OUT"  /dev/null &
383 
384  fi
[root@localhost bin]# ./catalina.sh start
Using CATALINA_BASE:  /app/apache-tomcat-7.0.61
Using CATALINA_HOME:  /app/apache-tomcat-7.0.61
Using CATALINA_TMPDIR: /app/apache-tomcat-7.0.61/temp
Using JRE_HOME:    /app/jdk1.7.0_79
Using CLASSPATH:    /app/apache-tomcat-7.0.61/bin/bootstrap.jar:/app/apache-tomcat-7.0.61/bin/tomcat-juli.jar
Tomcat started.
[root@localhost bin]# service tomcat stop
[root@localhost bin]# service tomcat start

[root@localhost logs]# crontab -e
no crontab for root - using an empty one
crontab: installing new crontab
[root@localhost logs]# crontab -l
30 5 * * 6 /bin/find /usr/local/tomcat/logs/ -mtime +7 -type f -name "catalina.*.out" -exec /bin/rm -f {} \;
[root@localhost logs]# cat /var/spool/cron/root 
30 5 * * 6 /bin/find /usr/local/tomcat/logs/ -mtime +7 -type f -name "catalina.*.out" -exec /bin/rm -f {} \;
[root@localhost logs]#

%a       本地简短星期名(e.g.: Sun..Sat)  
%A      本地完整星期名(e.g.: Sunday .. Saturday)  
%b      本地简短月名(e.g.: Jan .. Dec)  
%B      本地完整月名(e.g.: January .. December)  
%c       本地日期与时间(e.g.: “Sun Dec 15 14:12:47 GMT 1996″)  
%d      一月中的第几日(01 .. 31)  
%j       一年中的第几天 (001 .. 366)  
%m      月名的数字表示 (01 .. 12)  
%U      一年中以星期日为每周第一天计算的星期数(00..53, 第一周包括新年的第一个星期日)  
%W      一年中以星期一为每周第一天计算的星期数(00..53, 第一周包括新年的第一个星期一)  
%w      星期名的数字表示 (0 .. 6, 0为星期日)  
%x       本地日期 (e.g. 今天在北京是: “15/12/96″)  
%y       不带世纪的年(00 .. 99)  
%Y       带世纪的年(1970 .. 2038)

%H        24小时制小时(00..23)  
%I        12小时制小时(01..12)  
%p        本地AM/PM指示符  
%M       分钟(00..59)  
%S        秒(00..61)  
%X       本地时间(e.g.: “15:12:47″)  
%Z       时区 (e.g. GMT)，如果不能检测出时区，值为空

%%        %字符  
%n        新行  
%t         tab字符