Free Practice Questions for RedHat RH033 Exam

The lprm command is used to remove a job from the print queue.

Answer option C is incorrect. The lpq command is used to view the content of the print queue.

Answer option D is incorrect. The lpr command sends a job to the print queue.

Answer option B is incorrect. The lpc command is used to control the operation of a line printer system.

To compare the contents of two files the diff command is used in the Red Hat operating system.

This is the correct syntax for granting ownership of foofile to John.

What is the chown command?

The chown command is used to change the ownership of a file. Only root can change the ownership of a file. The chown command can be used with the -R option to recursively change the ownership of an entire directory tree.

Syntax:

chown [-R] newowner filename

Answer option B is incorrect. The chmod command is used to change access mode for files and directories.

Answer option D is incorrect. The syntax of this command is not correct. With chown, first write the name of the user whom you want to give ownership, then write the filename of the file whose ownership you want to change.

Answer option C is incorrect. The chgrp command is used to change Group-ownership not file ownership.

The head -n 5 /etc/passwd command will show the first 5 lines of the file /etc/passwd.

In order to accomplish the task, you will have to execute the following command: find /-perm -4000

This command will search the current directory and its sub-directories for all the files on which SUID has been set.

Answer options C and B are incorrect. The ls command is used to list all files in the current directory and its subdirectory.

Answer option A is incorrect. This will find all the files on which SGID is set.

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

In order to accomplish the task, you will use the at command. The at command is used to set a specific command or batch file to execute at a certain time.

Syntax:

at [option] schedule time

Several options are used with the at command. Following is a list of some important options:

The atd daemon monitors the queue of the at commands and executes them at a specified time.

Example:

The following command will create a list of jobs to be executed at 8:00 AM on 22nd August 2004.

at 08:00 22.08.2004

at> ls

at> pwd

+

The + key combination is used to end the list of commands.

The jobs can be removed from an at queue by using the atrm command.

Note: The at command cannot schedule recurring jobs.

Answer option C is incorrect. You will not run the crontab command, since it runs a program repeatedly. The crontab command is used to view and edit the crontab files, which are used to organize the cron facility. Each user has access to the

cron facility through a crontab file. Some of the frequently used crontab command options are as follows:

Answer option A is incorrect. In computing, rsync is a software application for Unix systems. It synchronizes files and directories from one location to another while minimizing data transfer using delta encoding. It can copy or display directory contents and copy files, optionally using compression and recursion.

In daemon mode, rsync listens to the default TCP port of 873, serving files in the native rsync protocol or via a remote shell such as RSH or

SSH. In the latter case, the rsync client executable must be installed on both the local and remote hosts.

Answer option D is incorrect. The sync command is used to flush filesystem buffers. It ensures that all disk writes have been completed before the processor is halted or rebooted. Generally, it is preferable to use reboot or halt to shut down a system, as they may perform additional actions such as resynchronizing the hardware clock and flushing internal caches before performing a final sync.

In order to replace all the occurrences of "net" with "Net" in the first fifty lines of the file, you will have to execute the following command: :1,50 s/net/Net/g

This command is issued in the command mode of the VI utility. 1,50 defines the initial and final line numbers of the current document where the command will execute. The s/ switch with the net/Net/g option will globally replace all the occurrences of "net" with "Net".

Answer option A is incorrect. This command will replace "net" with "Net" all over the current document.

Answer option B is incorrect. Since this command executes on the first 100 lines of a document, it will replace "net" with "Net" in all the 100 lines of the current document.

Answer option D is incorrect. This command will replace "net" with "Net" in the current line of the current document.

The ls command is used to list files on a Linux computer. The syntax of the ls command is as follows:

ls [option] [directory name]

Several options are used with the ls command. Following is a list of some important options:

For example, the following command displays all the files (including hidden files) in the /home directory and the contents in the subdirectories:

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 appends that file.

Answer option A is incorrect. 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.

Answer options C and B are incorrect. Improper syntax has been followed in these answer options.