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QUESTION 2: A Backup Script Write a script called: backup SWITCH FILES DEST MESSAGE Example: ./backup -D ~/source/*.c ~/backup Where: SWITCH is optional: -D for deleting original files after backup. If not present, the original files to be backed-up are not deleted. FILES is the path, using wild cards, of the files to be backed-up. DEST is the path to the backup directory. MESSAGE is a multiword description about the backup. It will be added to a log file. Use vi to create the script. The script must do the following in the order presented: 1. Make sure the script is running under Bash. 2. Verify that the script has the correct number of arguments. If it does not the script must terminate with the following error message: "You have the incorrect number of arguments. The correct syntax is: ./backup SWITCH FILES DEST MESSAGE. Please try again." 3. Verify that the DEST directory exists. If it does exist, then do nothing. If it does not exist, then create the directory. 4. Using the TAR command, backup all the FILES to DEST. Call the backup file name: "backupDATE.tar". Where DATE is today's date (not time). 5. CHMOD the tar file as RW for only the owner. 6. Append to a logfile called "backups.log" the MESSAGE preceded by todays date and time. This logfile is within the backup directory. The format of this log message is: DATE TIME MESSAGE. It is all on one line. Each time the backup script is called a new log is appended to this file.

QUESTION 2: A Backup Script Write a script called: backup SWITCH FILES DEST MESSAGE Example: ./backup -D ~/source/*.c ~/backup Where: SWITCH is optional: -D for deleting original files after backup. If not present, the original files to be backed-up are not deleted. FILES is the path, using wild cards, of the files to be backed-up. DEST is the path to the backup directory. MESSAGE is a multiword description about the backup. It will be added to a log file. Use vi to create the script. The script must do the following in the order presented: 1. Make sure the script is running under Bash. 2. Verify that the script has the correct number of arguments. If it does not the script must terminate with the following error message: "You have the incorrect number of arguments. The correct syntax is: ./backup SWITCH FILES DEST MESSAGE. Please try again." 3. Verify that the DEST directory exists. If it does exist, then do nothing. If it does not exist, then create the directory. 4. Using the TAR command, backup all the FILES to DEST. Call the backup file name: "backupDATE.tar". Where DATE is today's date (not time). 5. CHMOD the tar file as RW for only the owner. 6. Append to a logfile called "backups.log" the MESSAGE preceded by todays date and time. This logfile is within the backup directory. The format of this log message is: DATE TIME MESSAGE. It is all on one line. Each time the backup script is called a new log is appended to this file.

Database System Concepts
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
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QUESTION 2: A Backup Script Write a script called: backup SWITCH FILES DEST MESSAGE Example: ./backup -D ~/source/*.c ~/backup Where: SWITCH is optional: -D for deleting original files after backup. If not present, the original files to be backed-up are not deleted. FILES is the path, using wild cards, of the files to be backed-up. DEST is the path to the backup directory. MESSAGE is a multiword description about the backup. It will be added to a log file. Use vi to create the script. The script must do the following in the order presented: 1. Make sure the script is running under Bash. 2. Verify that the script has the correct number of arguments. If it does not the script must terminate with the following error message: "You have the incorrect number of arguments. The correct syntax is: ./backup SWITCH FILES DEST MESSAGE. Please try again." 3. Verify that the DEST directory exists. If it does exist, then do nothing. If it does not exist, then create the directory. 4. Using the TAR command, backup all the FILES to DEST. Call the backup file name: "backupDATE.tar". Where DATE is today's date (not time). 5. CHMOD the tar file as RW for only the owner. 6. Append to a logfile called "backups.log" the MESSAGE preceded by todays date and time. This logfile is within the backup directory. The format of this log message is: DATE TIME MESSAGE. It is all on one line. Each time the backup script is called a new log is appended to this file.
Transcribed Image Text:QUESTION 2: A Backup Script Write a script called: backup SWITCH FILES DEST MESSAGE Example: ./backup -D ~/source/*.c ~/backup Where: SWITCH is optional: -D for deleting original files after backup. If not present, the original files to be backed-up are not deleted. FILES is the path, using wild cards, of the files to be backed-up. DEST is the path to the backup directory. MESSAGE is a multiword description about the backup. It will be added to a log file. Use vi to create the script. The script must do the following in the order presented: 1. Make sure the script is running under Bash. 2. Verify that the script has the correct number of arguments. If it does not the script must terminate with the following error message: "You have the incorrect number of arguments. The correct syntax is: ./backup SWITCH FILES DEST MESSAGE. Please try again." 3. Verify that the DEST directory exists. If it does exist, then do nothing. If it does not exist, then create the directory. 4. Using the TAR command, backup all the FILES to DEST. Call the backup file name: "backupDATE.tar". Where DATE is today's date (not time). 5. CHMOD the tar file as RW for only the owner. 6. Append to a logfile called "backups.log" the MESSAGE preceded by todays date and time. This logfile is within the backup directory. The format of this log message is: DATE TIME MESSAGE. It is all on one line. Each time the backup script is called a new log is appended to this file.
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