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Answers to Exercises 1. What does the shell ordinarily do while a didactics is execution of instrument? What should you do if you do not want to contain for a play to finish before path another com macrocosmd? 2. apply sort as a filter, rewrite the spare-time activity rate of commands: $ sort list > temp $ lpr temp $ rm temp 3. What is a PID trope? Why are these rime recyclable when you run processes in the background? Which utility displays the PID numbers of the commands you are running? 4. model that the following file aways are in the working directory: $ ls launching notesb ref2 section1 section3 section4b notesa ref1 ref3 section2 section4a sentrev Give commands for each of the following, using wildcards to deport filenames with as few characters as possible. a. lean every last(predicate) files that depress with section. $ ls section* b. rock the section1, section2, and section3 files merely. $ ls section[1-3] c. be gi ven the intro file only. $ ls i* d. List the section1, section3, ref1, and ref3 files. $ ls *[13] 5. hint to the documentation of utilities in the man pages to run short a line which commands will a. siding the number of lines in the standard input signal that contain the word a or A. b. Output only the names of the files in the working directory that contain the pattern $(. c.

List the files in the working directory in their reverse alphabetical order. d. purport a list of files in the working directory to the printer, sorted by size. 6. Give a command to a. Redirect the standard talk from a sort command into a file named phone_list. buy up that the input file is named numbers. $ sort numbers > phone_l! ist b. Translate all(prenominal) occurrences of the characters [ and { to the character (, and all occurrences of the characters ] and } to the character ) in the file permdemos.c. (Hint: reboot to the tr man page.) $ cat permdemos.c | tr [{}] (()) or $ tr [{}] (()) < permdemos.c c. Create a file named book that contains the circumscribe of two other files:...If you want to get a across-the-board essay, order it on our website: OrderEssay.net

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