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Linux System Admin > Chapter 7 (Using Network Clients) > Flashcards

Chapter 7 (Using Network Clients) Flashcards

1
Q

A program making requests

A

A Client

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2
Q

— is a terminal emulation program

A

Telnet

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3
Q

— is not designed to transfer any information between computers except your keystrokes as you type, and the characters that are displayed on the screen.

A

Telnet

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4
Q

—- lists the users that are logged in on all hosts attached to the local network that have the r-utilities networking features activated.

A

rwho

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5
Q

—- lists all hosts attached to the local network (that are using r-utilities) with the uptime for each

A

ruptime

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6
Q

— logs in to a remote host; very similar to telnet, but uses the r-utilities authentication methods described in this section.

A

rlogin

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7
Q

you can enter the — command with the -l option to specify the account name on oslo that you want to use.

A

rlogin

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8
Q

you can use the — command to execute a program on a remote host without logging in

A

rsh

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9
Q

to copy files between a host (r-utilities)

A

rcp

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10
Q

A — procedure is a procedure that can repeat itself indefinitely.

A

Recursive

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10
Q

The SSH package includes utilities such as —, which acts like rcp, letting you copy files between any two computers on your network with full encryption.

A

scp

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11
Q

This process of copying an entire website or FTP site is called —.

A

Mirroring

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12
Q

(wget command line option)

Download all supporting files to permit local display if a web page referred to on the wget command line.

A

-p

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13
Q

(wget command line option)

Converts links in a download web page so that they refer to the download supporting files (such as images)

A

-k

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14
Q

(wget command line option)

Retry the download the stated number of times if the download of the web page is interrupted for any reason.

A

-t 40

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15
Q

(wget command line option)

View web page header information as the page and other files are downloaded.

A

-s

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16
Q

(wget command line option)

Save downloaded web page header information to a file.

A

-s

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17
Q

(wget command line option)

Use recursive downloads

A

-r

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18
Q

(wget command line option)

Set the number of levels for recursive downloads; used with the -r option

A

-I 3

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19
Q

(FTP commands)

Turn on binary mode

A

Bin

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20
Q

(FTP commands)

Exit the FTP program

A

Bye

21
Q

(FTP commands)
Copy a file from one location to another on the FTP server; normally requires regular user access to the FTP server ( not just anonymous access)

A

cp

22
Q

(FTP commands)

Download a file

A

Get (file name)

23
Q

(FTP commands)

List files contained in the current directory on the FTP server.

A

ls

24
Q

(FTP commands)

Download multiple files using regular expression (such as .tgz)

A

Mget (expression)

25
Q

(FTP commands)

Create new directory on the FTP server; normally requires regular user access to the FTP server

A

Mkdir

26
Q

(FTP commands)

Upload multiple files using a regular expression (such as .html)

A

Mput expression

28
Q

(FTP commands)

Turn on or off prompting for download or upload of individual files when using mget or mput commands.

A

Prompt

29
Q

You can enter — command to view the active networking interfaces.

A

ifconfig

30
Q

The — —- assigned to each interface is labeled inet addr on the second line of the corresponding section.

A

IP address

31
Q

The — utility sends a diagnostic data packet to the computer you specify

A

ping

32
Q

The ping command sends a series of – byte packets to the host with the IP address

A

64 byte

33
Q

What are the two major benefits of using traceroute?

A

Finding where a packet stops

Finding where a packet slows down

34
Q

Three well known methods of accessing Linux systems remotely are —, the — and the — suite of utilities. The first two are considered unprotected and highly vulnerable and should not be used except for convenience on networks that are completely trusted.

A

Telnet, r-utilities, ssh

35
Q

The — — let you access a remote system without entering a password.

A

r-utilities

36
Q

Starts the — graphical utility used to manage downloads of web pages.

A

kget

37
Q

A more advanced version of the ftp utility

A

ncftp

38
Q

Synchronizes a set of files that is stored on two or more systems and needs to be kept consistent as changes are made to the files.

A

rsync

39
Q

(wget command line option)

Mirror a web site using a recursive download of web pages

A

-m

40
Q

Telnet is able to do the following

A
  • Log into a remote computer
  • You can view any files that your user account permits you to use
  • You can also execute any command, including changing or deleting files.
41
Q

To be able to telnet, you need to know the following.

A
  • The remote host to which you want to connect. (Domain name or IP address)
  • Port number (default is 23)
  • The type of terminal that you want the software to emulate (standard choice is VT100)
  • Username and password
42
Q

— are most effective when you can set up a configuration file on multiple computers where you have a user account.

A

r-utilities

43
Q

(note) You can enter the rlogin command with the -l option to specify the account name that you want to use.

A

|

44
Q

You can create a hidden file in your home directory called — containing a list of hosts and user names that you want to permit access your account without a password.

A

.rhosts

45
Q

The — — is configured in the file /etc/ssh/sshd_config.

A

sshd daemon

46
Q

To check the status of the sshd server program, use the following command on the sever while logged in as root.

A

service sshd status

47
Q

If the server is ready to accept client connections, you should be able to use the following command on the client to connect to sshd on the server.

A

$ ssh -l username server

48
Q

(note) the ssh_host_rsa_key.pub contains a public key

A

|

49
Q

– and — are two types of encryption supported by ssh

A

RSA and DSA

50
Q

The default key length is?

A

1024 bits

51
Q

to alter the length of a ssh key, use this command

A

-b

(Example) ssh-keygen -t rsa -b 2048

52
Q

You can limit the number of recursive levels of recursive levels using the – option to turn on recursive downloads and the – option to set the number of levels of recursion to use

A
  • r

- l

Linux System Admin (6 decks)

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