tailieunhanh - Automating Linux and Unix System Administration Second Edition phần 3

Tham khảo tài liệu 'automating linux and unix system administration second edition phần 3', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | CHAPTER 4 CONFIGURING SYSTEMS WITH CFENGINE 73 according to the read bits because we requested files to be publicly readable directories will also be publicly executable. The checksum option requires a little more explanation. The file s checksum is stored so the administrator will be warned if it changes later. In fact the administrator will be warned every hour unless you configure cfengine to update the checksum database. In that case the administrator will be notified only once and then the database will be modified. You can enable this preference by adding the following command in the control section control ChecksumUpdates on Here are some other options you might want to use in the files section links You can set this option to traverse to follow symbolic links pointing to directories. Alternatively you can set it to tidy to remove any dead symbolic links links that do not point to valid files or directories . ignore You can specify the ignore option multiple times. Cfengine version 2 requires a pattern or a simple string but not a regular expression. Cfengine version 3 repairs this inconsistency look for more information on cfengine 3 at the end of this chapter . Any file or directory matching this pattern is ignored. For instance ignore A . would ignore all hidden files and directories. include If any include options are listed any files must match one of these regular expressions in order to be processed. exclude Any file matching any of the exclude regular expressions will not be processed by cfengine. define If the directives in this files section result in changes being made to any listed files a new class will be defined. You can also list several classes separated by colons. elsedefine Similar to define but here new classes are defined if no changes are made to the listed files. You can also list several classes separated by colons. syslog When set to on cfengine will log any changes to the system log. inform When set to on cfengine will log any .