Create a file named foo. What happens when you run the command > In foo bar if bar doesn't exist? bar exists as an ordinary file? bar exists as a directory? Make sure you precede each of your answer with the "if . . .' condition. Copy the pertaining command(s) and their output(s) from your terminal to justify your answers

Create a file named foo. What happens when you run the command > In foo bar if bar doesn't exist? bar exists as an ordinary file? bar exists as a directory? Make sure you precede each of your answer with the "if . . .' condition. Copy the pertaining command(s) and their output(s) from your terminal to justify your answers

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

Please log in as “root” and create a new directory called “myScripts”on your desktop (i.e., /root/Desktop).Please leave a comment with your name at the end of each of your script files. You can use “#” to insertcomments in your script. Write a script and save it as /root/Desktop/exercise1. This script performs the followingfunctions:a. Asks the user for the length and width (in feet) of a rectangular roomb. Calculates the area of the roomc. Displays the result to the userRun the script in terminal using the command: bash /root/Desktop/exercise1 SO I HAVE WROTE THE SCRIPT BUT I DON'T KNOW HOW TO SAVE IT TO EXERCISE1 AND DISPLAY IT, JUST NEED TELL ME HOW TO DO IT , NO NEED SCRIPT
Below is a sequence of shell commands that we typed into a bash terminal window on a Linux machine and some of the output that was produced. Your job is to write the output produced by the commands in the sequence. The commands are executed consecutively and changes made by one command may affect the output produced by later commands. First Create a Directory and Rename as Name_AridNo like (Ali_18-Arid-102) and then execute the following commands and show output. Shell > pwd /home/me/test > ls -F hw1 hw1.bak tmp/ > bash > touch it > cd tmp > ls –F justme.txt > echo “Dear Ali” > diary > cat ‘Name_AridNo’ /etc/hosts > pwd
Create a file named "YournameTask03.txt". Change its permission using absolute(numeric) mode. so that it has ONLY executed permission of owner and group ONLY. Solve this task by using shell scripting
Assuming you have created already created a MySQL database named "database_name" with a table named "users" that has columns for "username", "password", and "email". And that you have also created a login system that sets the "username" session variable when a user logs in.Write a simple PHP code that makes use of sessions, mysql insert, update, and delete. The code should first start with a session using session_start(). It should then connect to a MySQL database using mysqli_connect(). It inserts a new record into the users table using mysqli_query() and an SQL INSERT statement. It updates an existing record in the users table using mysqli_query() and an SQL UPDATE statement. It deletes a record from the users table using mysqli_query() and an SQL DELETE statement. It sets a session variable using $_SESSION["username"] and displays it using echo. Finally, it closes the MySQL connection using mysqli_close()
Assume that we have an application that processes files of some sort. One version of the application requires users to type in full path names of filles for processing using a command-line. The other allows users to use a GUI version of the application to locate and "pick" a file for processing. Which version (command-line or GUI) do you think would work better for users? Why?PLEASE DO NOT write a LONG essay for this! I expect to see one clear statement of which version would be "better" and 2 - 3 points to support that choice.
Utilize looping to make your Python script for Functionality 2 [You should allow users to enter information for five employees at the same time, where the first employee information entry is saved in index [0] and the second entry is saved in index [1], and so on. You want to make sure to enforce the user to enter the following employee information: employeeName, employeeSSN, employeePhone, employeeEmail, employeeSalary. After the user finishes entering the last employee information, they should get a message to allow them to print specific employee information from the saved list. The user can enter values between 1 and 5, where 1 will return the employee information saved in the list index [0], 2 will return the employee information saved in the list index [1] and so on.]to run constantly. while having it run constantly Add Employee – this functionality will allow users to add new employee to the system. View all Employees – this functionality will view all employees in the system.…
Write a vending machine program with the Linux Shell Script. There will be only 3 items that you can choose from. Each item will have a set price that you can choose. If a user input money, they can keep making purchases until they either have no money or they want their change back. You can only use the while, until and for loops. You can also use the if, continue and break commands. Towards the end of the transaction, it must show: what item was purchased and how much money has been returned back to the user.
Modify rnfile such that it will keep a copy of the old existing file (if available) before the renaming operating. Assume that apple.txt will be renamed as orange.txt. When the command “./rnfile apple.txt orange.txt” is executed, the script will first check whether orange.txt exists under the given path or not. If the file exists then orange.txt will be renamed as orange.txt_old before renaming apple.txt as orange.txt. Make rnfile an executable shell script; try to rename a file to a filename that already exists. Show your shell program and its output to the instructor.
Give the line(s) of code required to create a scanner object that will read text from a file called "PriceList.txt" that is in the directory "C:ADocuments\BusinessI" A- BI mac za/mod/quiz/attempt.phplattempts 11457888emida 2770868page=17
The file phonenumbers.txt is in the phone directory (a subdirectory of the /contacts directory). What is the complete path to phonenumbers.txt?
Utilize looping to make your Python script for Functionality 2 You should allow users to enter information for five employees at the same time, where the first employee information entry is saved in index [0] and the second entry is saved in index [1], and so on. You want to make sure to enforce the user to enter the following employee information: employeeName, employeeSSN, employeePhone, employeeEmail, employeeSalary. After the user finishes entering the last employee information, they should get a message to allow them to print specific employee information from the saved list. The user can enter values between 1 and 5, where 1 will return the employee information saved in the list index [0], 2 will return the employee information saved in the list index [1] and so on.]to run constantly. while having it run constantly Add Employee – this functionality will allow users to add new employee to the system. View all Employees – this functionality will view all employees in the system.…
Assume your Student ID is 432306128. Use the first two numbers from right to get your exercise part. Addthem and find the remaining of the devision by 10. Example: (? + ?)%?? = ?* Create a folder for your programs and name it with your ID. Implement the programs and finally zip themand send to me. Only soft copy is accepted.