centos patch management

http:/ /longvnit.com/blog/?p=941 http://blog.chinaunix.net/u1/53728/showart_1073271.html (based on Red Hat rhel5u2 gfs2+iscsi+ Xen+cluster solution for High scalability) http://www.yubo.org/blog/?p=27 (iscsi+clvm+gfs2+xen+cluster) http:// Linux.chinaunix.net/bbs/thread-777867-1-1.html Not distributed file system, but shared disk cluster file system, which requires some kind of mechanism in the machineShared disk, plus lock mechanism, so need to DRBD/ISCSI/CLVM/DDRAID/GNBD do disk sharing, and

Command: [RPM-Q package name] (check if package is installed, query)[RPM-QA Package Name] (query all installed RPM packages, all)Example: Rpm-qa | grep httpd [RPM-QI package name] (-I: Query software information information,-p: query for package information not installed)[RPM-QL Package Name] (query package inside the file installation location,-L: list) [rpm-qf System file name] (-F: Querying system files for which package filename)[RPM-QR Package Name] (-r: Query package dependency requires

In the end of the second phase of the Canton Fair Internship, and ushered in a few days of leisure, continue to learn Linux. In the previous essay on Linux learning CentOS (17)--some important commands related to Linux file and directory management, ① has documented some important commands related to Linux file and directory management, including directories and

1. Introduction to package Management2. RPM Command Management (Redhat Package Manager)3. Yum Online Installation4. Source Package Management5. Script installation Package5.1 Preparatory work5.1.1 Turn off RPM package installation of httpd and MySQL/usr/local/apache2/bin/apachectl stoprm-rf/usr/local/apache2/Service httpd StopService MySQL StopService Mysqld Stop5.1.2 to ensure proper use of Yum sourcesYum List5.1.3 Turn off SELinux and firewalls　　　　　

|--checksig} package FILE650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/5E/2B/wKiom1UpS-CTKlNVAAFnwE1gr3Q034.jpg "title=" 8.jpg " alt= "Wkiom1ups-ctklnvaafnwe1gr3q034.jpg"/>--nosignnature: Does not check the legitimacy of the source --nodigest: Do not check integrityRPM Manager database:/var/lib/rpm (each program installed, the installation information will be stored in this directory)Rebuild the database:--INITDB: Initialize the database, that is, the database does not exist at all,

--best represents the slowest compression method (high compression ratio).The system default value is 6.instruction Example:Gzip *% compress each file in the current directory into a. gz file.GZIP-DV *% extracts each compressed file in the current directory and lists detailed information.Gzip-l *% Detail shows the information of each compressed file in Example 1, and does not understand the pressure.Gzip usr.tar% compress the tar backup file Usr.tar, at which time the compressed file has a. tar.