PART H 1- What does cd ..do? 2- What does cd ../.. do? 3- If you do cd / followed by pwd, what will happen? 4- What information about a file is shown by ls -laF? 5- In the following example, explain the fields of the output from ls -laF ddir dsp: drwxr-xr-x 22 dave staff 4096 Jan 12 2001 dir/ crw-rw---- 1 root audio 14, 3 Jan 22 2001 dsp 6- If you have two files, a and b, and you issue the command mv a b, what happens? Is there an option to my that will issue a warning in this situation? 7- What is the command to duplicate the contents of /dir1 to /dir2, preserving modification times, ownership and permissions of all files? 8- How do you make the file secret readable and writable by root, readable by the groupwheel and inaccessible to everybody else? 9- How can you remove a directory, including its contents, with a single command? 10- What does chown -R user.user /path/to/directory/ do? 11- How can you recognize symbolic links when using 1s? 12- How can you see what a symbolic link points to? 13- What happens if you attempt to create a symbolic link to a file that doesn't exist?

PART H 1- What does cd ..do? 2- What does cd ../.. do? 3- If you do cd / followed by pwd, what will happen? 4- What information about a file is shown by ls -laF? 5- In the following example, explain the fields of the output from ls -laF ddir dsp: drwxr-xr-x 22 dave staff 4096 Jan 12 2001 dir/ crw-rw---- 1 root audio 14, 3 Jan 22 2001 dsp 6- If you have two files, a and b, and you issue the command mv a b, what happens? Is there an option to my that will issue a warning in this situation? 7- What is the command to duplicate the contents of /dir1 to /dir2, preserving modification times, ownership and permissions of all files? 8- How do you make the file secret readable and writable by root, readable by the groupwheel and inaccessible to everybody else? 9- How can you remove a directory, including its contents, with a single command? 10- What does chown -R user.user /path/to/directory/ do? 11- How can you recognize symbolic links when using 1s? 12- How can you see what a symbolic link points to? 13- What happens if you attempt to create a symbolic link to a file that doesn't exist?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

Complete the sentences with proper adjectives: 1. Thank you. That lesson was really.... This meal is........... (delicious, busy) 2. 3. Look at the view! It's. 4. It is really...... 5. This man is. 6. Is this a ...(interested, interesting) (amazing, amazed) day. (wonderful, high) (tall, high) train to London? (fast, patient)
i need the answer quickly
While each of us has had a reading of our blood pressure taken, many of us may not know what blood pressure actually means. Blood pressure is expressed as a ratio of the maximum (systolic) and minimum (diastolic) pressure found in the aorta during one cardiac cycle. These pressure values are measured in millimeters of mercury (mmHg). Determining abnormal blood pressure is critical for diagnosing and averting a number of serious health problems (e.g. heart disease and stroke). Doctors therefore make decisions about the potential for serious health problems based on a few simple calculations. One simple calculation of interest is mean arterial pressure (MAP). The mean arterial pressure is the average pressure during the cardiac cycle. The MAP of a normal, resting heart can be computed by the formula: MAP = DP + (1/3)PP where DP is the diastolic pressure and PP is the pulse pressure. Create a Java class file called MeanArterialPressure. This program will compute a user's mean arterial…
Is computer gaming generally healthy or unhealthy for people? Can you support your claim with evidence?
168. Each loop in spiral model is splited into a. two sections b. three sections c. four sections d. five sections
Is it currently possible to trick a Mechanical Turk? The Turks of today and the Turks of the 18th century have many things in common, but what sets them apart?
discrete math
(3) (a) A fair coin is flipped, if it lands on the head side, one dice is rolled and X is the resulted number, if it lands on the tail side, two dice are rolled and X is the resulted sum. Calculate E[X] and V[X]. Write a computer program and carry out a simulation to verify your answers. (b*) A person starts walking home from a bar towards his home. The distance is n blocks. Every hour he either manages to walk one block towards home, or gets confused and picks up a cab back to the bar (each with probability 1/2). At any point, if he is at the bar, he always moves ahead one block. What is the expected time it takes him to get home? (c) Write a computer program' and carry out a simulation to verify your answer. (If you have trouble with part (b), do the computer simulation and formulate a conjecture of the answer for partial credits.)
Which of following may not be a question regarding how to find if a program is efficient or not? (a) How much time does it take for a program to complete? (b) How much memory does a program use? (c) How does a program withstand abrupt changes of the input data? (d) What is the difference between the average case and the worst-case efficiency? to solve the problem is (ii.) A program is said to be easy when (i.) size of the input to the problem. (a) A Turing Machine (b) An Automation (c) An Algorithm (d) In reciprocal relationship (e) In proportional relationship (f) In polynomial relationship in time with the
Is gaming on computers generally good or bad for people's health? Can you back it up with any proof?
H.w 1) He always ( ) about travels A(lies) B(lying) C(lied) 2) she was walking around when a child ( ) to cry A(begin) B(began) C(begun)
Computer science