Free Practice Questions for RedHat RH033 Exam

A pipe is a way to connect the output of one command to the input of another command without any temporary file.

What is a pipe?

A pipe is a temporary storage place where the output of one command is stored and then passed as the input for another command. Pipes are used to run more than two commands from the same command line.

Syntax:

command1 | command2 | command3...........etc.

Answer option A is incorrect. The operator > is used to redirect standard output (STDOUT) to a file.

Answer option C is incorrect. The operator 2> is used to redirect standard error (STDERR) to a file.

Answer option D is incorrect. The operator &> is used to redirect all output to a file.

The lpstat -a, lpstat -l commands list the configured printer in the network.

Answer option D is incorrect. The lpstat -r command shows whether or not the CUPS server is running. Answer option C is incorrect. The lpstat -o command shows the jobs queue on the specified destinations.

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.

The LPRM command is used to remove a file from a print queue.

Answer option D is incorrect. The LPQ command reports the status of a print queue.

Answer option A is incorrect. The LPR command is used to submit a file for printing.

Answer option B is incorrect. There is no command such as LPQDEL in Linux.

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.

If there is no free space on the hard disk drive, users will not be able to write on it. To prevent this issue from happening again, you should track the amount of free space on the hard disk. By doing so, you can take necessary actions before the actual problem arises.

Answer option B is incorrect. Even if users save their important files, the hard disk drive will still become full sooner or later.

Answer option A is incorrect. Dedicating a hard disk drive for users to save their files will not prevent the drive from becoming full.

Answer option D is incorrect. The shortage of RAM is not the issue in this scenario.

When a user types alias c= 'clear' on the command prompt and presses Enter this will create an alias for the clear command. After creating the alias whenever a user wants to clear the screen, he just needs to type c and then press Enter.

This action will clear the screen. This alias will be lost if a user logs out and logs in again.

What is the alias command?

The alias command is a shortcut name for longer commands. If a command is run often, but it takes a considerable amount of time in typing that command, the time can be reduced by using the alias command.

For example: # alias list= 'ls-la'

This will create an alias called list, which will use the ls command to print a long-style listing of all files in the current directory (the -l gives a long-style list, and the -a shows all files -including hidden files).

Answer options B, C, and A are incorrect. These are incorrect commands and will show error messages on the command prompt.

The shutdown -h now, halt -h, and poweroff -h commands can be used to shut down the Red Hat operating system immediately.

Answer option B is incorrect. This is an invalid answer and hence cannot be used to shut down the system.

This command will run sort on the file marketing.txt and sort the file in the reverse alphabetical order.

Answer option B is incorrect. sort with no options is used to sort file alphabetically. It will not sort the file in the reverse alphabetical order.

Answer option C is incorrect. The -n option used with the sort command sorts the text numerically, instead of by characters.

Answer option A is incorrect. The -u option with sort removes duplicate lines from the output.

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: