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Tham khảo tài liệu 'actualtests exam: 117-201 title : advanced administration ver : 12.29.03', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Exam 117-201 Title Advanced Administration Ver 12.29.03 117-201 QUESTION 1 Which two utilities can you use to set up a job to run at a specified time A. at and crond B. atrun and crontab C. at and crontab D. atd and crond Answer C Explanation The at command is used to execute commands at a specified time and optional date. A cron job is a program or script scheduled at a specified time. The crontab program is used to create user cron jobs. Reference http www.oreillynet.com linux cmd aZat.htmlhttp www.oreillynet.com linux cmd c crontab.html Incorrect Answers. A The Cron daemon crond is the program that runs the cron job at the specified time. It is not used to set up a cron job. B Atrun is used to run jobs scheduled by the at program. It is not used to set up a job to run at a specified time. D Atd is the at deamon. Similar to the cron daemon it is the program that runs the jobs scheduled with the at command. QUESTION 2 After creating a backup of the users home directories called backup.cpio you are asked to restore a file called memo.ben. What command should you type Answer cpio -iF backup.cpio memo.ben Explanation The cpio command is used to create backups or restore files from a backup. The -i option is to extract something. The F option is to specify a file. Here we are extracting memo.ben from a file named backup.cpio. Reference http www.oreillynet.com linux cmd c cpio.html QUESTION 3 You wish to restore the file memo.ben which was backed up in the tarfile MyBackup.tar. What command should you type Answer tar xf MyBackup.tar memo.ben Explanation Tarfiles are created using the tar utility. Therefore you should use the tar utility to extract the files. The x option is to extract and the f option is to specify a filename to extract from. Reference http www.oreillynet.com linux cmd t tar.html QUESTION 4 When is the most important time to restore a file from your backup A. On a regular scheduled basis to verify that the data is available. B. When the system crashes.
