Red Hat Linux Networking , System Administration (P7) pps

... covered is the Red Hat Network, a subscription service available with Red Hat Enterprise Linux that you can use to keep your system current. You can register your systems with Red Hat and then ... for the following books: KDE Bible, The Samba Book, Unix Weekend Crash Course, Red Hat Linux 9 For Dummies, Solaris 9 For Dummies, Fedora Linux 2 For Dummies, and Linux Tim...

Ngày tải lên: 07/07/2014, 09:20

... decided, also, to assume the con- trol that Linux offers, and the responsibilities that this entails. By its very nature as a modern, multiuser operating system, Linux requires a degree of administration ... is. Summary As you, the system administrator, read this book, bear in mind that your tasks are ongoing and that there is never a machine that is completely tuned, entirely up to...

Ngày tải lên: 07/07/2014, 09:20

... Red Hat boot disk starts your PC and the Red Hat Linux installation program. After you install Red Hat Linux, you no longer need the Red Hat boot disk (except when you want to reinstall Red Hat ... section. Creating the Red Hat Boot Disk To boot Red Hat Linux for the first time and start the Red Hat Linux installa- tion program, you need a Red Hat bo...

Ngày tải lên: 07/07/2014, 09:20

... configuration files, documentation, and binary files for the Perl programming language come in a Red Hat package. You use a special program called Red Hat Package Manager (RPM) to install, uninstall, and ... set of packages that Red Hat recommends for instal- lation for the class of installation (Personal Desktop, Workstation, Server, or Custom) you have chosen. You can, however,...

Ngày tải lên: 07/07/2014, 09:20

... Enterprise Linux provide support for many file systems. Linux supports those from other operating sys- tems, remote file systems, memory file systems, CD-ROM file systems, virtual file systems, and ... not present, ~/.cshrc ), ~/.history, ~/.login, ~/.cshdirs. ■■ zsh — zsh reads the following when starting up: /etc/zshenv, ~/.zshenv, /etc/zprofile, ~/.zprofile, /etc/zshrc, ~/.zshrc, an...

Ngày tải lên: 07/07/2014, 09:20

... Figure 8- 2, you can see that the first few services start in this order: kudzu, reconfig, iptables, and network. That is so because their scripts are named S05kudzu, S06cpuspeed, S08iptables, and ... GPG keys for Red Hat Net- work. No files in this directory should be edited by hand. For more informa- tion on Red Hat Network, see the Red Hat Network Web site at https:// rhn.re...

Ngày tải lên: 07/07/2014, 09:20

... or Enterprise Linux system. First, you can use the X Configuration tool, which is a graphical tool that gives you the ability to change some of the most significant settings, such as display, monitor, and ... usually does a good job of detecting the system mouse, keyboard, video card, and monitor. When you log in to your system, the settings are generally what they should be for a func-...

Ngày tải lên: 07/07/2014, 09:20

... on /projects type autofs (rw,fd=4,pgrp=11081,minproto=2,maxproto=4) # mount -t nfs diskbeast:/proj on /projects/code type nfs (rw,soft,rsize=8192,wsize=8192,nfsvers=2,addr=192.168.0.1) Using mount’s ... your system, particularly the portmapper, which has long been a target of exploit attempts. Similarly, you should add entries in /etc/hosts.deny lockd, statd, mountd, and rquotad. More genera...

Ngày tải lên: 07/07/2014, 09:20

... programs in action, mysqladmin, mysqlshow, and mysql. mysqladmin is a utility that enables you to perform administrative activities, such as: ■■ Creating, modifying, and deleting (dropping, in SQL parlance) ... connecting. By default, MySQL assumes that a user is connecting from localhost (that is, the IP address 127.0.0.1 ), so username@localhost needs a password. However, in most cases,...

Ngày tải lên: 07/07/2014, 09:20

... backhoe, say ), access to that time server will be impaired. NTP is engineered to select an alternative server, but if all your servers use that same severed backbone, you’re hosed. So, for example, ... (ntpq, ntpdc, ntpdate, ntptrace, tickadj, ntptime, ntiptime, ntp-kegen, and ntpdsim ), and the all-important configuration file, /etc/ntp.conf. The NTP daemon is dual-purpose. It acts as...

Ngày tải lên: 07/07/2014, 09:20

... RPC call ), such as getattr, read, or write, the number of such operations performed, and the distribution of each operation. For example, 1 0,8 61 getattr operations have been performed, which represents ... SMTP, HTTP, ICMP, ARP, DNS, SSH, scp, sftp, and others. The significance of TCP/IP as the basis for these services cannot be over- looked. TCP/IP provides a platform- and operating...

Ngày tải lên: 07/07/2014, 09:20

... number of blocks read is 4,0 0 1,6 4 3, which totals 2,0 4 8,8 4 1,2 16 bytes or about 1.9 GB. ■■ The total number of blocks written is 3,4 2 3,9 8 1, which totals 1,7 5 3,0 7 8,2 72 bytes or about 1.6 GB. Performance ... display unit, which defaults to bytes, use -S k for units of 1000 bytes, -S K for true kilobytes (1024 bytes ), -S m for units of 1,0 0 0,0...

Ngày tải lên: 07/07/2014, 09:20

... as follows: SELINUXTYPE=targeted 2. While editing /etc/selinux/config, make certain that the SELINUX variable is set to permissive, that is: SELINUX=permissive This line starts SELinux with the ... the major Linux distributions, including Fedora Core, RHEL, SUSE Linux (now known as Novell Enterprise Desktop ), Debian, and a version of Gentoo Linux known as Hardened Gentoo). NOTE SELi...

Ngày tải lên: 07/07/2014, 09:20

... installation, the file system, networking, and booting the system. A final section addresses a few common problems that do not fit into other categories. Troubleshooting Techniques Trying to fix a system ... upgrade, the prob- lem could be due to the use of partition labels. Red Hat Linux uses partition labels to help prevent problems that occur when moving hard drives around in a...

Ngày tải lên: 07/07/2014, 09:20

... links, 13 5, 68 3, 688 SystemV, 147 troubleshooting, 888–891 ufs, 147 unmounting, 68 3, 69 0, 694–695 Veritas FREEVxFS, 145 VFS layer, 145 virtual file systems, 149–154 Windows versus Linux, 143 file ... encryption, 399–40 1, 403–404 policy, 22–2 3, 27 Postfix mail server, 482–483 Samba, 34 3, 344 secure NFS, 290 security log, 2 7, 28 Sendmail, 478 server and service...

Ngày tải lên: 07/07/2014, 09:20