UNIX System Administration A Beginner’s Guide PHẦN 4 potx

... scanner, the ability to scan a particular port is paramount. One good way to determine if all the systems on a network have a standard set of network services or a particular function is to scan ... utility that locates and identifies all available TCP and UDP ports on a target host system. Also known as a port scanner, this tool will scan TCP ports from 0 to 10 24 (by default)...

Ngày tải lên: 13/08/2014, 04:21

... operates on the application layer and uses TCP. Additional Services Many public domain TCP/IP services and applications are also available via the Internet. Some of the resources available are ... users on a remote system. This command is similar to the UNIX who command and operates on the application layer and uses TCP. 266 UNIX System Administration: A Beginner’s Guide 6. Wh...

Ngày tải lên: 13/08/2014, 04:21

... the operating system. UNIX has also found its way and gained popularity in the embedded world, which means, like the 2 UNIX System Administration: A Beginner’s Guide ● Maintain system capacities ... software may have been released before the hardware. In this case, the hardware wasn’t available while the software was being written. As a result, the operating system vendor...

Ngày tải lên: 13/08/2014, 04:21

... Team-Fly ® 98 UNIX System Administration: A Beginner’s Guide Modifying a User The sam application can be used to alter an existing UNIX account. To make a change to a user, do the ... options are described and summarized in Table 2-10 and some of them are explained below. 54 UNIX System Administration: A Beginner’s Guide Command Definition -a Dis...

Ngày tải lên: 13/08/2014, 04:21

... that are installed on an alternative root file system. -v Display more detailed information regarding products. Table 4- 3 Common swlist Command-Line Options 144 UNIX System Administration: A Beginner’s ... application package calls, which makes complete sense given that Netscape is a Web browser application. A quick scan of the available packages installed on a generic sy...

Ngày tải lên: 13/08/2014, 04:21

... ifconfig supports both formats, they can be used interchangeably. Each of the standard IP class addresses has associated default netmask addresses, as shown in Table 11 -4. The broadcast address can be specified ... local network—this means all frames with a destination address of all 376 UNIX System Administration: A Beginner’s Guide Operator Description > Greater than <...

Ngày tải lên: 13/08/2014, 04:21

... contained in and its logical position in that MIB hierarchy. 40 4 UNIX System Administration: A Beginner’s Guide ASN.1 Data Type Description Opaque A data type that provides the ability to pass arbitrary ... the appropriate subagent, it takes a certain amount of processing time and overhead. This might be a factor in time-critical management functions. 40 8 UNIX System...

Ngày tải lên: 13/08/2014, 04:21

... to obtain a large amount of information from an agent. See the following snmpbulkwalk section for additional information. 5 04 UNIX System Administration: A Beginner’s Guide 49 2 UNIX System Administration: ... output datagrams discarded 0 datagrams with no route 0 fragments received 0 datagrams reassembled 0 reassembly failures 0 datagrams fragmented 0 fragmentation failu...

Ngày tải lên: 13/08/2014, 04:21

... Solaris HP-UX Add swap space swapon -a swap swapon -a Create swap area using a regular file mkswap mkfile List swap usage swapon -s swap -l swapinfo -ta Delete swap area swapoff swap -d Table ... increase swap space even if the currently used space is quite a bit smaller than that available—perhaps because the system administrator wants additional performance gains, one or more additi...

Ngày tải lên: 13/08/2014, 04:21