安装过程如下：

下载（最新版本）

    #  wget http://cronolog.org/download/cronolog-1.6.2.tar.gz

2、解压缩

    # tar zxvf cronolog-1.6.2.tar.gz

3、进入cronolog安装文件所在目录

    # cd cronolog-1.6.2

4、运行安装

    # ./configure
    # make
    # make install

5、查看cronolog安装后所在目录（验证安装是否成功）

    # which cronolog

一般情况下显示为：/usr/local/sbin/cronolog

要想分割tomcat7的catalina.out，需作如下工作：

进入Tomcat的bin目录，打开catalina.sh文件，一般我们修改下面行中的内容（做好用root用户），

（1）if [ -z "$CATALINA_OUT" ] ; then
  CATALINA_OUT="$CATALINA_BASE"/logs/catalina.out
fi
改为：
if [ -z "$CATALINA_OUT" ] ; then
  CATALINA_OUT="$CATALINA_BASE"/logs/catalina.%Y-%m-%d.out
fi
（2）touch "$CATALINA_OUT"  
if [ "$1" = "-security" ] ; then
    if [ $have_tty -eq 1 ]; then
      echo "Using Security Manager"
    fi
    shift
    eval \"$_RUNJAVA\" \"$LOGGING_CONFIG\" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs=\"$JAVA_ENDORSED_DIRS\" -classpath \"$CLASSPATH\" \
      -Djava.security.manager \
      -Djava.security.policy==\"$CATALINA_BASE/conf/catalina.policy\" \
      -Dcatalina.base=\"$CATALINA_BASE\" \
      -Dcatalina.home=\"$CATALINA_HOME\" \
      -Djava.io.tmpdir=\"$CATALINA_TMPDIR\" \
      org.apache.catalina.startup.Bootstrap "$@" start \
      >> "$CATALINA_OUT" 2>&1 "&"      
  else
    eval \"$_RUNJAVA\" \"$LOGGING_CONFIG\" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs=\"$JAVA_ENDORSED_DIRS\" -classpath \"$CLASSPATH\" \
      -Dcatalina.base=\"$CATALINA_BASE\" \
      -Dcatalina.home=\"$CATALINA_HOME\" \
      -Djava.io.tmpdir=\"$CATALINA_TMPDIR\" \
      org.apache.catalina.startup.Bootstrap "$@" start \
      >> "$CATALINA_OUT" 2>&1 "&"
       

  fi

  if [ ! -z "$CATALINA_PID" ]; then
    echo $! > "$CATALINA_PID"
  fi
改为：
#  touch "$CATALINA_OUT"  
if [ "$1" = "-security" ] ; then
    if [ $have_tty -eq 1 ]; then
      echo "Using Security Manager"
    fi
    shift
    eval \"$_RUNJAVA\" \"$LOGGING_CONFIG\" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs=\"$JAVA_ENDORSED_DIRS\" -classpath \"$CLASSPATH\" \
      -Djava.security.manager \
      -Djava.security.policy==\"$CATALINA_BASE/conf/catalina.policy\" \
      -Dcatalina.base=\"$CATALINA_BASE\" \
      -Dcatalina.home=\"$CATALINA_HOME\" \
      -Djava.io.tmpdir=\"$CATALINA_TMPDIR\" \
      org.apache.catalina.startup.Bootstrap "$@" start 2>&1 \
      | /usr/local/sbin/cronolog "$CATALINA_OUT" >> /dev/null &
  else
    eval \"$_RUNJAVA\" \"$LOGGING_CONFIG\" $LOGGING_MANAGER $JAVA_OPTS $CATALINA_OPTS \
      -Djava.endorsed.dirs=\"$JAVA_ENDORSED_DIRS\" -classpath \"$CLASSPATH\" \
      -Dcatalina.base=\"$CATALINA_BASE\" \
      -Dcatalina.home=\"$CATALINA_HOME\" \
      -Djava.io.tmpdir=\"$CATALINA_TMPDIR\" \
       org.apache.catalina.startup.Bootstrap "$@" start 2>&1 \
       | /usr/local/sbin/cronolog "$CATALINA_OUT" >> /dev/null &

  fi

  if [ ! -z "$CATALINA_PID" ]; then
    echo $! > "$CATALINA_PID"
  fi  

Tomcat7 catalina.out 日志分割