managing linux systems with webmin system administration

... Hulton Getty Trang 2Red Hat ® Linux ® Networking and System AdministrationTrang 4Red Hat ® Linux ®Networking and System Trang 5Red Hat® Linux® Networking and System AdministrationPublished by Hungry ... Official Red Hat®Linux® Guide to Networking and System Administration K URT W ALLhas worked with Linux and Unix for nine years and is the author of several other books, including Red Hat Linux 7.2 Weekend ... of functionality in a typical Red Hat Linux system. Part I — Red Hat Linux System and Network Administration Defined This part describes the duties of a system administrator Chapter 1 explains

Ngày tải lên: 12/12/2013, 22:15

... WallNetworking and System Administration Third Edition Trang 4Red Hat ® Linux ® Networking and System AdministrationThird Edition Trang 6Terry Collings and Kurt WallNetworking and System Administration ... a system administrator, ning with an explanation of the duties of a system administrator and continu-ing through installing your system and finishing with descriptions of the filesystem and system ... your system,including the GRUB boot loader and the init process In Chapter 7, you explorethe details of the file system hierarchy and learn about other supported filesystems Part I ends with

Ngày tải lên: 07/07/2014, 09:20

... 6: System Startup and Shutdown Chapter 7: The File System Explained Chapter 8: Examining the System Configuration Files Trang 10Duties of the System Administrator IN THIS CHAPTER ■■ The Linux System ... Summary 593 xxviii Contents Trang 2Part Four System Administration 595 Chapter 26 Keeping Your System Updated with up2date Accessing the Red Hat Network with a Web Browser 608Summary 614 Determining ... can be misleading Linux is quite different from the most popular com-mercial operating systems in a number of ways While it is no more difficult tolearn than other operating systems are, it is

Ngày tải lên: 07/07/2014, 09:20

... ones you should ask: ■■ How critical are the systems to daily operation? ■■ Could the systems be down and not affect operations? Obviously, if your systems are used for business, they could not ... forlong, if at all You must determine how vital a given system is to your opera-tion Vital systems require greater fault tolerance than nonvital systems do Besure to keep in mind that greater fault ... locations, that act as a single system Network services run on each sys-tem and requests for services are distributed between the systems Eachsystem is connected to every other system by a dedicated link

Ngày tải lên: 07/07/2014, 09:20

... your Linux system (for a private LAN, you can assignyour own hostname without worrying about conflicting with any otherexisting systems on the Internet) ■■ IP address of the gateway (the system ... default operating system Thedefault operating system is the one with a check mark in the Default column in Figure 3-10 In this case, Red Hat Linux is the default operating system.All of the instructions ... you want to boot the PC A table then liststhe Linux partition and any other partitions that may contain another operatingsystem If your system has a Linux partition and a DOS partition (that actuallyhas

Ngày tải lên: 07/07/2014, 09:20

... related to system sound and video For example, if you want to adjust the system volume, use the utility here ■■ System Tools — This menu choice gives you access to many Enterprise Linux system administration ... utilities related to system sound and video For example, if you want to adjust the system volume, use the utility here ■■ System Settings — This menu item contains Enterprise Linux system administration ... root file system created within the actual root file system The minimal root environment lets your programs run, but prevents anyone from doing any damage to your actual root file system Also,

Ngày tải lên: 07/07/2014, 09:20

... System Boot ■■ Shutting Down the System ■■ Changing the GRUB Configuration All Red Hat systems, whether Fedora Core or Enterprise Linux, use a similarprocedure for starting up the operating system ... desktop ■■ System Tools— This menu choice gives you access to many EnterpriseLinux system administration utilities Tools for configuring your net-work and printers are located here ■■ System Settings— ... steps that all systems must perform to boot When youturn on your PC, it runs a program called the basic input/output system(BIOS) The BIOS is the only way to communicate with the system componentsuntil

Ngày tải lên: 07/07/2014, 09:20

... operating systems is that Linux canread and write to several different file systems that originated with other oper-ating systems much different from Linux This section details the different filesystems ... reduces system administration time This is a fast file system, and now you can read and write to and from it with your Red Hat Linux machine Nonstandard Linux File Systems Support for these file systems ... The SystemV file system driver currently supportsAFS/EAFS/EFS, Coherent FS, SystemV/386 FS, Version 7 FS, and Xenix filesystems N OT E Do not confuse a FAT file system with a FAT32 file system

Ngày tải lên: 07/07/2014, 09:20

... information /etc/sysconfig/selinux This file is a link to /etc/selinux/config and is used to control selinux onthe system It contains two settings that control the state of selinux — enforc-ing, permissive, ... file controls the state of SELinux on the system. # SELINUX= can take one of these three values: # enforcing - SELinux security policy is enforced. # permissive - SELinux prints warnings instead ... it APM is a monitoring daemon that works with power man-agement code within the Linux kernel It can alert you to a low battery if youare using Red Hat Linux on a laptop, among other things Figure

Ngày tải lên: 07/07/2014, 09:20

... Enterprise Linux also give you similar features Configuring the X Server with the X Configuration Tool You have basically two ways to configure the X server on your Fedora Core or Enterprise Linux system ... usingthe X Configuration tool, beginning with changing the display resolution Managing the X Window System IN THIS CHAPTER ■■ Configuring the X Server with the X Configuration Tool ■■ Manually ... Enterprise Linux, you can use two video cards and monitors on your system if you desire To configure a second video card and monitor, dothe following: 1 On Enterprise Linux 4 choose Applications ➪ System

Ngày tải lên: 07/07/2014, 09:20

... Hat Enterprise Linux systems, the /etc/exportsfile is the main NFS configuration file It lists the file systems the serverexports, the systems permitted to mount the exported file systems, and ... file systems youwant to share and several daemons that make these shared file systems visible com-to and available for use by client systems on the network When an NFS server is sharing a file system ... default) for file systems that are exported read-only;file systems that are largely static (such as /usr or /var); and file systemsfrom which only subdirectories and not the entire file system, are

Ngày tải lên: 07/07/2014, 09:20

... automatically mounts all networked file systems notconfigured with the noauto option, including NFS file systems It does this byparsing /etc/fstab looking for file systems of type nfs, nfs4 (described ... command mounts all (-a) file systems of type nfs (-t nfs) The second command mounts only the file systems /home and/usr/local(for this command to work, the file systems you want tomount must ... /etc/auto.home with themount point /home and the map file /etc/auto.var with the /var mountpoint Thus, /etc/auto.home defines the file systems mounted under/home, and /etc/auto.var defines the file systems

Ngày tải lên: 07/07/2014, 09:20

... if client systems are members of multiple NIS domains or if they canconnect to one of several servers for the same NIS domain, the following formenables you to associate a given server with a given ... users to log in at any system (running an NISclient and an NFS client) and always have access to their home directory with-out having to make any modification on the client system except to enable ... mounted on the clientsystem at the mount point /net And here’s the procedure: The server system has already been configured as an NIS and NFS server Likewise, the client system has already been

Ngày tải lên: 07/07/2014, 09:20

... pass-on productipass-on systems The anpass-onymous user has limited privileges tially, read-only), but it isn’t a good idea to have unsecured accounts on a pro-duction system (essen-If you choose ... mysql> prompt In your commands,replace magicword with the password you’ve chosen and hostname with Trang 5com-the fully qualified domain name of your system The flush privilegesinstruction causes ... getting clogged up with spam and viruseswithout having to learn how to maintain a complicated RDBMS As remarked at the beginning of this section, MySQL is an extremely popular database withWeb programmers,

Ngày tải lên: 07/07/2014, 09:20

... systems to coordinate their system clocks with the NFS server’s clock, the problem went away and has not returned Eventually, we set up a time server for the entire LAN and configured all systems ... to meet that requirement. With minimal configuration on the server side and no configuration on the client side, you can provide remote access to one or more Linux systems using VNC. As always, ... modify your system’s firewall setup (you are running a firewall, right?). 1. To start the Security Level Configuration tool, select Red Hat ➪ System Settings ➪ Security Level or type system-config-securitylevel

Ngày tải lên: 07/07/2014, 09:20

... a journaling file system offers two clear advantages for an NFSserver First, in the event of a crash, journaling file systems recovermuch more quickly than nonjournaling file systems If you value ... a journaling file system on an NFS server Second, journalingfile systems need only update the journal to maintain data integrity, so an NFS server running a journaling file system “completes” ... information, not only for NFS but also for allvarieties of Linux issues, is the Linux Performance Tuning Web site athttp://linuxperf.nl.linux.org/ Trang 10Optimizing NISHow do you know when you

Ngày tải lên: 07/07/2014, 09:20

... Tool, type system-config-httpd at a command prompt or select Red Hat ➪ System Settings ➪ Server Settings ➪ HTTP Server However, we do not recommend using HTTP Configuration Tool on your systems ... extension extension with thecontent handler named by handler The following statement, for instance,instructs Apache to use the image map handler imap-file with files whosename ends with map: AddHandler ... is remarkably simple Dataencrypted with the public key can be decrypted only with the private key,which only you know So, anyone can send you data encrypted with the pub-lic key but only you will

Ngày tải lên: 07/07/2014, 09:20

... Forge — Syndication with RSS,” which appeared in the print version of Linux Journal in September 2004 and is also available on the Web at Linux Journal’s Web site at www.linuxjournal .com/article/7670 ... content management systemseven include tools to create RSS feeds automatically Other tools exist that youcan use to validate your RSS feeds for correct format This section ends with alist of RSS ... shipwith the ht://Dig search engine installed and ready to go This sectiondescribes how to get it going Getting Started with ht://Dig ht://Dig is a complete document searching and indexing system

Ngày tải lên: 07/07/2014, 09:20

... system (orsystems, depending on how many you have configured) Along the leftside of the page are links to information about your account and set-tings that you can change ■■ Systems— The Systems ... R TFour System Administration Chapter 26: Keeping Your System Updated with up2date and the Red Hat Network Chapter 27: Upgrading and Customizing the Kernel Chapter 28: Configuring the System at ... Restoring the File System Chapter 32: Performance Monitoring Trang 4■■ Using the RedHat up2date Agent■■ Registering Your System with the Red Hat Network ■■ Accessing the Red Hat Network with a Web browser

Ngày tải lên: 07/07/2014, 09:20

... Altix systems SN2-■■ ia64/configs/tiger_defconfig— Another configuration able for DIG-compliant systems suit-■■ ia64/configs/zx1_defconfig— A configuration suitable for HP’sZX1 and SX1000 IA-64 systems ... Similarly, most systems onwhich you will run Fedora Core or RHEL should have System V IPC enabled.IPC, which stands for Interprocess Communication, allows programs running on a Linux system to share ... at theLinux Kernel Archives The current Linux Kernel Archives OpenPGP key isalways available from www.kernel.org/signature.html The first step is to import the Linux Kernel Archive key With an

Ngày tải lên: 07/07/2014, 09:20