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Make sure that the users and the groups actually exist in /etc/passwd and /etc/group, respectively 2 Create a VirtualHost for each user that requires PUT publishing as follows:
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NameVirtualHost IP_Address <VirtualHost IP_Address> ServerName vhost_domain_name AssignUserID user_name group_name Alias location_alias physical_directory_under_document_root <Location location_alias> EnablePut On AuthType Basic AuthName Name_of_the_Web_section AuthUserFile path_to_user_password_file <Limit PUT> require username </Limit> </Location>
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# Other directives that you need for the site </VirtualHost> Example: NameVirtualHost 1921681100 <VirtualHost 1921681100> ServerName caroldomaincom AssignUserID carol carol_group DocumentRoot /www/intranet/htdocs/carol Alias /publish/ /www/intranet/htdocs/carol/publish/ <Location /publish> EnablePut On AuthType Basic AuthName Carol s Publishing Site AuthUserFile /www/intranet/secrets/users <Limit PUT> require carol </Limit> </Location> </VirutalHost>
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User carol can publish in the http://caroldomaincom/publish directory by using her own user account The files created by the Web server are also accessible to her via FTP, as well as by other means, because the files are owned by user carol 3 After you create a virtual host for each user, restart the Apache server by using the /usr/local/apache/bin/apachectl restart command and test each user s setup by publishing a test page using the appropriate URL
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After you ve implemented the Web cycle and have a content-generation process in place, it is important to maintain your Web Typical Web maintenance tasks include server monitoring, logging, and data backup The server monitoring and logging aspects of Web site maintenance are discussed in 8 This section discusses data backup You should have two types of backup, if possible online and offline which I describe in the following sections
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Online backup is useful in the event of an emergency You can access the backup data fairly quickly and, in most cases, perform necessary restoration tasks in a few minutes To obtain an online backup solution, you can either look for a commercial
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online backup vendor or talk to your ISP If you are hosting your Web server(s) on your own network, however, you can keep backups on another host on your network On most Unix systems, you can run a program called rdist to create mirror directories of your Web sites on other Unix hosts ( 23 has an example of an rdist-based site-mirroring application) It may even be a good idea to keep a compressed version of the Web data on the Web server itself On Unix systems, you can set up a cron job to create a compressed tar file of the Web data on a desired frequency For example:
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# for system V-ish Unix, weekday range is 0-6 where 0=Sunday # For BSD-ish system use weekday range 1-7 where 1=Monday # This example is for a Linux system (System V-ish cornd) 30 2 * * 0,1, 3, 5, root /bin/tar czf /backup/M-W-F-Suntgz /www/* 30 2 * * 2, 4, 6 root /bin/tar czf /backup/T-TH-Sattgz /www/*
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If these two cron entries are kept in /etc/crontab, then two files will be created Every Monday, Wednesday, Friday, and Sunday, the first cron job will run at 2:30 am to create a backup of everything in /www, and it will store the compressed backup file in the /backup/M-W-F-Suntgz file Similarly, on Tuesday, Thursday, and Saturday mornings (at 2:30 am), the second cron entry will create a file called T-TH-Sattgz in the same backup directory for the same data Having two backups ensures that you have at least last two days backup in two compressed files
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You should also perform backups on removable media and keep them in safe locations Restoring from this type of backup is usually a time-consuming operation You can use tape drives, removable hard drives (such as Jaz disks) to perform this backup I prefer an 8-mm tape-based backup because it provides 8GB of data storage capacity; also, 8-mm tape drives have been on the market much longer than the new compact removable media As your Web sites grow richer in content, the available Web space is rapidly filling This is often a consequence of files that are unused but that are never removed for fear that something (such as a link) will break somewhere If you think this is true for your Web site, and you are on a Unix platform, you may want to consider running the find utility to locate files that have not been accessed for a long time For example:
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find /www -name *bak -type f -atime +10 -exec ls -l {} \;
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This lists all files in /www directories that end with the bak extension and have not been accessed for the last 10 days If you want to remove these files, you can replace the ls -l command and do a find such as:
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find /www -name *bak -type f -atime +10 -exec rm -f {} \;
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