The evince utility is used to view the PDF files in Linux.

Answer option A is incorrect. The ps2pdf utility creates the PDF files.

Answer option C is incorrect. The pdf2ps utility converts the PDF files to PostScript.

Answer option B is incorrect. The a2ps utility converts text to PostScript and sends it to the print queue or file.

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 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.

When a user account is removed from a Linux system with the userdel command, the user account would get removed but some files and directories of that user may still remain on the system. To remove all items, the -r option is used with the userdel command.

The -f option forcibly removes the user account even if the user is still logged in. It also forces userdel to remove the user ' s home directory or his mail spool even if another user uses the same home directory or if the mail spool is not owned by the specified user.

Answer option C is incorrect. The -h option with the userdel command displays help messages and then exits.

Answer option D is incorrect. This command is incorrect. The -c option is not used with the userdel command.

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 appends that file.