Red Hat RH033 Online Practice Questions and Exam Preparation

Red Hat RH033 Online Questions & Answers

• Question 61:

  Which of the following are the Graphical Mail clients in Red Hat Enterprise Linux?

  Each correct answer represents a complete solution. Choose two.

  A. Pidgin
  B. Mozilla
  C. Evolution
  D. mutt
  B. Mozilla
  C. Evolution

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  Explanation/Reference:

  The Evolution and Mozilla are the Graphical Mail clients in Red Hat Enterprise Linux.

• Question 62:

  Which of the following commands is used to change file access permissions in Linux?

  A. chown
  B. chmod
  C. chperm
  D. chgrp
  B. chmod

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  Syntax: chmod [option] [mode]

  Option: The following is a list of some important options that can be provided with the command:

  

  Mode: Mode is written in the following format: [ugoa] [+-=] [rwxXstugo] The combination of ugoa specifies the users for whom the file access permissions will be changed. In ugoa, u is for the user who owns the file, g is for other users in the file group, o is for other users not in the file group, and a is for all users. The operator + adds the specified permissions to the existing permissions of each file. The - operator removes, and the = character specifies that the specified permissions are the only permissions for that file. The combination of rwxXstugo is permission type. In rwxXstugo, r is for read, w is for write, x is for execute, X is to execute only if the file is a directory or already has execute permission for some user, s is to set user or group ID on execution, t is to save program text on swap device, u are the permissions that the user who owns the file currently has for it, g are the permissions that other users in the file group have for the file, and o are the permissions that other users not in the file group have for the file. Answer option A is incorrect. The chown command is used to change the user or group ownership of the files specified with the command. Answer option D is incorrect. The chgrp command is used to change only the group ownership of the files specified with the command. What is the chgrp command? The chgrp (from change group) command is used by unprivileged users to change the group associated with a file. Unlike the chown command, chgrp allows regular users to change groups, but only to one of which they are a member. The general syntax of the chgrp command is as follows: chgrp group target1 [target2 ..] The group parameter indicates the new group with which the targets should be associated. The target1 parameter indicates the files or directories for which the change should be made. The target2 parameter indicates the optional additional files or directories for which the change should be made. For example:

  

  The above command changes the group associated with ttt to 'system', provided the executing user is a member of that group. Answer option C is incorrect. There is no such command as chperm in Linux.

• Question 63:

  You want to terminate your X session. Which of the following key combinations will you use to accomplish this?

  A. Ctrl+Alt+F7
  B. Ctrl+Alt+Backspace
  C. Ctrl+Alt+Fn
  D. Ctrl+Alt+A
  B. Ctrl+Alt+Backspace

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  Explanation/Reference:

  The Ctrl+Alt+Backspace key combination is used to terminate the X session. Answer option A is incorrect. The Ctrl+Alt+F7 key combination is used to switch from a virtual console back to the X terminal.

  Answer option C is incorrect. The Ctrl+Alt+Fn key combination is used to switch from graphical mode to the nth (n varies from 1-6) virtual console running in text mode. Answer option D is incorrect. Ctrl+Alt+A is not a valid key combination to

  terminate the X session.

• Question 64:

  Fill in the blank with the appropriate tool. __________ is a public domain collection of tools to allow Unix systems to manipulate MS-DOS files: read, write, and move around files on an MS-DOS file system.

  mtools

  Explanation/Reference:

  Mtools is a public domain collection of tools to allow Unix systems to manipulate MSDOS files: read, write, and move around files on an MS-DOS filesystem. Mtools are typically used to manipulate FAT formatted floppy disks. Each program attempts to emulate the MS-DOS equivalent command, these are different from Windows NT/2000 commands.

• Question 65:

  Which of the following commands look through the currently running processes, and list the process IDs that match the selection criteria to stdout?

  Each correct answer represents a complete solution. Choose all that apply.

  A. top
  B. pkill
  C. sort
  D. pgrep
  B. pkill
  D. pgrep

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  Explanation/Reference:

  pgrep looks through the currently running processes and lists the process IDs that match the selection criteria to stdout. All the criteria have to match. pkill is a tool that looks up or signals processes based on name and other attributes. Pkill will send the specified signal (by default SIGTERM) to each process instead of listing them on stdout. Answer option A is incorrect. The top command is used to produce a frequently-updated list of processes. By default, the processes are ordered by percentage of CPU usage, with only the "top" CPU consumers shown. This command shows how much processing power and memory are being used, as well as other information about the running processes. The following figure demonstrates the output of the top command:

  

  Answer option C is incorrect. The sort command is used to print the lines of its input or concatenation of all files listed in its argument list in sorted order. Sorting is done based on one or more sort keys extracted from each line of input. By

  default, the entire input is taken as the sort key. The blank space is taken used as the default field separator in the output of the sort command.

  The -r flag, however, reverses the sort order. For example, the ls -s | sort -nr command will sort the directories of the root directory in reverse order of size.

• Question 66:

  Which of the following files does the /var directory NOT contain?

  A. System log files
  B. Kernel files
  C. Email-spools
  D. Print spools
  B. Kernel files

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  Explanation/Reference:

  Kernel files do not change regularly and therefore are contained in the /boot directory, not in the

  /var directory.

  What is the /var directory?

  According to the Filesystem Hierarchy Standard, the /var directory contains regularly- changing system files. This comprises spool directories and files, and administrative and logging data.

  Answer option A is incorrect. System log files are stored in the /var directory. Answer options D and C are incorrect. Print spool files and email-spools are variable data files and therefore are contained in the /var directory.

• Question 67:

  Which of the following manual sections of MAN pages provides help information for administrative commands?

  A. 4
  B. 2
  C. 1
  D. 8
  D. 8

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  Explanation/Reference:

  The manual section 8 of MAN pages provides help information for administrative commands.

  Manpages are grouped into sections. Sometimes a user has to know the appropriate section in which he wants to search for an item. For example, if a user is interested in the print Clanguage function rather than the command, he has to tell

  the man program to search the section on library functions. The user can enter the following command to search the c-language print function: man 3 print

  The various MAN sections are as follows:

  

• Question 68:

  Which graphical mail client is the default tool for email and groupware in Red Hat Enterprise Linux?

  A. mutt
  B. Evolution
  C. Thunderbird
  D. pidgin
  B. Evolution

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  Explanation/Reference:

  The default tool for email and groupware in Red Hat Enterprise Linux is called Evolution. Evolution provides not only the email access, but also the ability to maintain a calendar, tasklist and contacts database.

  What is Evolution?

  Evolution is a full-featured personal and workgroup information management tool for Linux systems, and is the default email client for Red Hat Enterprise Linux. It provides all of the standard email client features, including powerful mailbox

  management, user-defined filters, and quick searches. Its additional feature is a flexible calendar/scheduler, which allows users to create and confirm group meetings and special events online. Answer option C is incorrect. Thunderbird is a

  graphical mail client that offers email, Usenet and rss support but it does not support groupware features. Thunderbird is provided along with Firefox and others as part of the Mozilla suit of application.

  What is groupware?

  Groupware refers to programs that help users work together collectively while located remotely from each other.

  Groupware services can include the sharing of calendars, collective writing, e-mail handling, shared database access, electronic meetings with each user able to see and display information to others, and other activities. Sometimes called

  collaborative software, groupware is an integral component of a field of study known as Computer- Supported Cooperative Work or CSCW.

  Answer options A and D are incorrect. The mutt and pidgin are Non-GUI mail clients. What is mutt? mutt is a powerful tool for managing email within a text-only environment. This tool is very important to access email even when a graphical

  interface is not available. Some of its strengths are handling of message threads and flexibility. When mutt sees a series of related messages, it displays each reply under the parent. mutt supports sending of attachments through a mail. The

  following example describes how a file can be attached to a mail: echo "Sending an attachment." | mutt -a backup.zip -s "attachment" [email protected]

  This command will send a mail to [email protected] with the subject (-s) "attachment", the body text "Sending an

  attachment.", containing the attachment (-a) backup.zip.

  What is Pidgin?

  Pidgin is a multi-protocol Instant Messaging client that allows a user to use all of his IM accounts at once. It is a free software that can work with AIM ,Gadu-Gadu, Jabber, ICQ ,IRC, MSN, SILC, XMPP, Yahoo!, and Zephyr Network. Anyone is

  free to use it and modify it, but if a user distributes his modifications, he must distribute the modified source code as well.

  The license of this communication software is Freeware, i.e. anyone can freely download and use this communication software.

• Question 69:

  You work as a Network Administrator for Perfect Solutions Inc. The company has a Linux- based network. You want to view the status of the current processes running on a Linux computer. You also want to save the output to the ProStat.txt file. Which of the following commands will you use to accomplish the task?

  A. ps < ProStat.txt
  B. ps | ProStat.txt
  C. ps > ProStat.txt
  D. ps
  C. ps > ProStat.txt

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  Explanation/Reference:

  The ps command reports the status of processes that are currently running on a Linux computer.

  What is > command?

  The > command is used for storing the output generated by different commands. It creates a file specified to store the output. If the specified file already exists, it overwrites that file.

• Question 70:

  You are a newly appointed technician for company Inc. The company has Linux- based network. You have executed a command find /home - user joe -group joe on the terminal. What will this command do?

  A. It will search for files owned by the user joe -group joe anywhere on the system.
  B. It will backup files owned by the user joe -group joe in /home/.
  C. It will display the content of a file that belongs to group joe.
  D. It will search for files owned by the user joe -group joe in /home/.
  D. It will search for files owned by the user joe -group joe in /home/.

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  Explanation/Reference:

  When you will execute the command find /home -user joe -group joe on the terminal, it will search for files owned by the user joe -group joe in /home/.

  What is the find command?

  The find command can perform a search based on a variety of search limitations. It searches through one or more directory tree(s) of a filesystem, locating files based on some user-specified criteria. By default, find returns all files in the

  current

  working directory. Further, find allows a user to specify an action to be taken on each matched file.

  Thus, it is an extremely

  powerful command for applying actions to many files. The find command can be used with a wild card (*), but it works best when we know the name of the file or directory we are looking for.

  The find command can search your system for files that comply with certain numeric criteria, such as the size of the file (- size), the number of links to the file (-links), the date of the last change to the files data (-mtime), or the date of the last

  time the file was read (- atime). All these criteria accept a numeric value. When a numeric value is provided to find, it looks for an exact match, more than the number, or less than the number.