RedHat RH033 Dumps Questions Answers

The cat data.txt.* command will display both the splitted files, and the > command will redirect the output into a new data.txt file.

What is the cat command?

The concatenate (cat) command is used to display or print the contents of a file.

Syntax: cat filename

For example, the following command will display the contents of the /var/log/dmesg file: cat /var/log/dmesg

Note: The more command is used in conjunction with the cat command to prevent scrolling of the screen while displaying the contents of a file.

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.

Answer option A is incorrect. This command will open a new file data.txt.* into the vi editor.

Answer option D is incorrect. This command will give the vi editor a warning "output is not to a terminal" since the vi terminal cannot be redirected into the data.txt file.

Answer option B is incorrect. The less command displays only the first file data.txt.aa, and the > command redirects the output into the data.txt file. Hence, John will not get the desired output using this command.

The second column in the listing shows the number of hard links created for the file.

According to the scenario, John can use the set +o history command to disable history.

Answer option D is incorrect. John cannot use the set -o history command to accomplish his task.

This command is used to enable disabled history.

Answer option A is incorrect. John cannot use the history !! command to accomplish his task. This command is used to see the most recently typed command.

Answer option C is incorrect. John cannot use the history !N command to accomplish his task. This command is used to display the Nth history command.

What is the history command?

In the bash shell, the history command is used to view the recently executed commands. History is on by default. A user can turn off history using the command set +o history and turn it on using set -o history. An environment variable

HISTSIZE is used to inform bash about how many history lines should be kept. The following commands are frequently used to view and manipulate history: