Operating Systems Practice Questions

11. Command to convert all capital letters in file to small case letters





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12. The command that Unix offers to a user to find out whether he can send messages to a particular terminal are





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13. when we are executing a shell script the shell acts as





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14. The output of the command banner 'Unix Shell Programming' would be





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15. The shell meta character $# represents





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16. what are the contents of the file /usr/lib/cron/at.deny ?





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17. The command cut -f 2,8 -d':' file1 would output





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18. The program contained in boot block that loads kernel into memory is called





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19. Which command displays the line numbers by the side of each line?





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20. Which statements are true if the file which contains the following line is submitted to the crontab command. 10 2 3 * 0 echo ``There is no substitute for hard work``





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