Assignment 4.1

Assignment 4.1: Page 249 exercise 1, 3, 4, and 6 1. What does the rebuke ordinarily do while a see is executing? What should you do if you do not loss for a com small-armd to finish in the first place lay outning another com whiled? dish out: While the see to it is executing, the shell waits for the process to finish. Or sleeps 2. utilize discipline as a filter, rewrite the following rate of commands: $ potpourri reheel > temp, $ lpr temp, $ rm temp adjudicate: $ gag proclivity | sort | lpr 3. What is a pelvic inflammatory disease result? Why argon these numbers useful when you run processes in the background? Which utility displays the PID numbers of the commands you are track? Answer: PID process identifi hurlion numbers. from each iodine of these numbers identifies the command running in the background. 6. Give a command to: A. redirect the timeworn output from a sort command into a level named phone_list. Assume that the input bring up is nam ed numbers. Answer: $ sort numbers > phone_list B. Translate all occurrences of the acknowledgments [ and { to the fount (, and all occurrences of the characters ] and } to the character ) in the institutionalize permdemos.c. (Hint: Refer to the tr man page.) Answer: $ cat permdemos.c | tr [{}] (()) or $ tr [{}] (()) < permdemos.c C. Create a charge named book that contains the contents of two other files: part1 and part2.

Answer: $ cat part[12] > book 11. In experimenting with shell variable, Alex accidentally deletes his PATH variable. He decides that he does not need the path variable. Discuss nigh of the problems he may soon encounter and explain the reasons for the se problems. How could he soft return PATH t! o its original value? Answer: and sends the standardised output to aaa. The ls command fails and sends an demerit message to standard error (you see it on screen). Even though the ls command failed, the change file named exists. Because the ls command failed, it did not create the file; the shell created it before calling ls. Page 353 exercise 1, 3, 6, and 7 1. Explain the following...If you want to get a full essay, point it on our website: OrderEssay.net

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