system administration networking and security

... Operational Administration Recovery and Security T he themes of this chapter are security and recovery These are two critical concepts for the RHCE exam This continues the discussion of system security ... commands You can mount filesystems, create directories, move files, and edit files using vi You can apply the fdisk and fsck commands to various hard disks and partitions A few other basic commands ... Chapter 11 Operational Administration Recovery and Security Filesystem Check—fsck You should also know how to use the fsck command This command is a front end for most of the filesystem formats available...

Ngày tải lên: 11/12/2013, 00:15

... at the System Administration, Networking and Security (SANS) Institute, but just know that you will need to customize them to fit your company’s culture and HR needs Social networking and security ... Advisory Council About GFI GFI Software provides web and mail security, archiving, backup and fax, networking and security software and hosted IT solutions for small to medium-sized enterprises ... company with thousands of partners throughout the world and is also a Microsoft Gold Certified Partner More information about GFI can be found at http://www.gfi.com Social networking and security risks...

Ngày tải lên: 14/03/2014, 22:20

... 2) vCloud Networking and Security vCloud Networking and Security Standard vCloud Networking and Security Advanced Firewall ● ● Virtual Private network (VPN) ● ● VXLAN ● ● vCloud Ecosystem Framework ... challenges and enable businesses to achieve their agility goals without disrupting their business models VMware vCloud Networking and Security vCloud Networking and Security virtualizes networks and security ... vCloud® Networking and Security Just as VMware vSphere® virtualized compute, vCloud Networking and Security virtualizes networking and security to enable greater agility, efficiency and extensibility...

Ngày tải lên: 22/03/2014, 15:21

... certificate authentication and IP Security G A domain provides organization, centralized administration, and control A domain helps organize and manage users and resources User accounts and resources are ... the features of NTFS security To learn more about the NTFS file system and setting file and folder permissions, see Chapter 14, “Understanding Resource Sharing and NTFS Security. ” Internet Access ... speeds and greater range, and are not limited to line of sight Windows XP fully supports the IEEE 802.11 standard and the security features that the standard provides This evolving standard is...

Ngày tải lên: 05/05/2014, 15:08

... a secure system N Using tools to monitor security LINUX IS A MULTIUSER, multitasking operating system from the ground up, and in this regard the system administrator has flexibility — and responsibility ... the system administrator You need to know what servers you need and how to employ them, and to be aware that it is bad practice and a potential security nightmare to enable services that the system ... hardware, security, or administration, the system can be up and running again with minimal disruption Only the system administrator may this c3632-X Ch01.F 2/21/02 8:33 AM Page Part I: Red Hat Linux System...

Ngày tải lên: 12/12/2013, 22:15

... Linux® Networking and System Administration a3632-X FM.F 2/21/02 8:33 AM Page ii a3632-X FM.F 2/21/02 8:33 AM Page iii Red Hat® Linux® Networking and System Administration Terry Collings and Kurt ... Linux—Supported File Systems 79 Standard disk file systems 79 Nonstandard Linux file systems 82 Memory file systems and virtual file systems ... full-time Linux and Unix author, editor, consultant, and programmer He has written five books about Linux and Unix programming and system administration, is working on his sixth, and is the technical...

Ngày tải lên: 12/12/2013, 22:15

... start The first 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 ... Internet and potentially unsafe for use even in a trusted network This section identifies key security issues of NFS in general and the security risks specific to an NFS server and to NFS clients and ... the server configured and functioning, you then learned how to configure a client system to access NFS exported file systems, again using key configuration files and commands and simulating the...

Ngày tải lên: 14/08/2014, 12:20

... Settings ➪ Security Level or type system- config-securitylevel at a command prompt Figure 16-2 shows the Security Level Configuration tool’s main screen Creating a VNC Server Figure 16-2 The Security ... and RHEL systems is text processing, programming, and email Twenty-four-bit and 32-bit color are computationally intensive; 16-bit color is much less demanding ■ ■ Reduce the amount of eye candy ... a single system and to allow a remote user full control over that system More succinctly, VPN makes a remote system part of the main network; VNC gives a remote user control over one system on...

Ngày tải lên: 14/08/2014, 12:20

... (the FTP put and mput commands for uploading files) and DELE (the FTP del command for deleting files) As a rule, it is unwise to permit FTP users to modify the file system, so if security is a ... standalone workstation, which is a system that is connected directly to the Internet and that has some sort of domain name resolution running, you want mail to that machine and to localhost (and/ or ... and POP servers are up and running and ready to service IMAP and POP clients Maintaining Email Security Do you think you have nothing to hide? Maybe you don’t, but email security is always a privacy...

Ngày tải lên: 14/08/2014, 12:20

... T Four 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 ... faster, more capable, and more flexible, and the build process has changed dramatically and for the better The kernel is the core of the operating system and runs the CPU, manages system memory, controls ... the postfix reload command to activate the changes Optimizing FTP Services Out of the box, vsftpd is pretty darn fast and makes lightweight demands on a system s memory and CPU resources If its...

Ngày tải lên: 14/08/2014, 12:20

... discusses Configuring the System at the Command Line key commands for showing, setting, and maintaining the date and time on a Red Hat system, specifically: ■ ■ hwclock — Displays and sets the hardware ... Displays and sets the system time and date ■ ■ rdate — Displays and sets the system clock from a network time server ■ ■ ntpd — Keeps system time synced to one or more time servers Single-Use Commands ... Commands The hwclock, date, and rdate commands are single-use commands for setting the system date and time That is, hwclock, date, and rdate have no inherent ability to keep a system s clock synced...

Ngày tải lên: 14/08/2014, 12:20

... following command to make an amanda directory: mkdir /amanda Backing Up and Restoring the File System Configuring AMANDA To configure AMANDA, you must make changes to the amanda.conf file and put it ... must install the base amanda package on both the client and server machines The amanda package contains several commands, shown in Table 31-6 Table 31-6 AMANDA Commands COMMAND USE amdump Normally ... including Windows systems AMANDA is included with Fedora Core and Red Hat Enterprise Linux To use AMANDA, install the following packages: ■ ■ amanda ■ ■ amanda-client ■ ■ amanda-server ■ ■ Gnuplot...

Ngày tải lên: 14/08/2014, 12:20

... understand how Bash uses the test and [ commands and the [[ compound command Yes, [ and [[ are commands, not operators test and [, which are equivalent commands, evaluate conditional expressions and ... redirect stdout and stderr to the same file, such as /dev/null, use a command of the following form: mycommand > /dev/null 2>&1 Replace mycommand with the command and any arguments the command requires ... identical form and more concise version of this command is: mycommand &> /dev/null The section titled “Redirecting Standard Output and Standard Error” in the Bash man page explains how and why this...

Ngày tải lên: 14/08/2014, 12:20

... Red Hat® Linux® Networking and System Administration Red Hat® Linux® Networking and System Administration Terry Collings and Kurt Wall M&T Books An imprint of Hungry ... Linux—Supported File Systems 79 Standard disk file systems 79 Nonstandard Linux file systems 82 Memory file systems and virtual file systems ... hardware, security, or administration, the system can be up and running again with minimal disruption Only the system administrator may this Part I: Red Hat Linux System and Network Administration...

Ngày tải lên: 11/10/2016, 06:54

... assign names and security level to the VLAN interfaces Use the nameif command • • nameif vlan20 inside security1 00 • Step nameif vlan30 outside security0 nameif ... and to transmit SCSI commands between them The SAN environments need to be accessible to the NAS and the larger IP Network FC over IP (FCIP) and SCSI over IP (iSCSI) are the emerging IETF standards ... storage-to-IP and storage-to-storage interconnects Security Services Security services include a number of tools used in the application environment to increase security The approach to security services...

Ngày tải lên: 10/12/2013, 16:16

... request Server sends result code and closes socket 16 LDAP Operations  Client Session Operations   Query and Retrieval Operations   Bind, unbind, and abandon Search and compare Modification Operations ...   Databases balanced for read and write Databases can be replicated too Both are extensible data storage systems Both have advanced search capabilities System Administration Directories  Types ... Directories Explained: An Introduction and Analysis, Addison-Wesley, 2003 Gerald Carter, LDAP System Administration, O’Reilly, 2003 J Heiss, “Replacing NIS with Kerberos and LDAP,” http://www.ofb.net/~jheiss/krbldap/,...

Ngày tải lên: 20/01/2014, 06:20