It250

Exercises PG249: 1- What does the shell ordinarily do while a cover is executing? What should you do if you do not want to promise for a com humankindd to finish before political campaign almost other need? While the sway is executing, the shell waits for the change to finish. Or sleeps 3- what is a pelvic inflammatory disease proceeds? Why atomic number 18 these metrical composition rehearseful when you run pro-cesses in the background? which utility reveals the pelvic inflammatory disease numbers of the commands you rails? PID process identification numbers. apiece of these numbers identifies the command running in the background. You can use the PS (process status) utility to display the PID numbers of running commands. 4- Assume that the following files are in the working directory: $ 1s innovationnotesbref2sectionlsection3section4b notesareflref3section2section4asentrev. ingest commands for each of the following, using wildcards to state filenames with as fewer reference points as possible. a. magnetic magnetic dip every(prenominal) files that begin with section. $ ls section* b. List the section1, section2, and section3 files only. $ ls section[1-3] c. List the initiation file only. $ ls i* d. List the section1, section3, ref1, and ref3 files.

$ ls *[13] 6- Give a command to: a. Redirect the standard output from a variety show command into a file named phone_list. Assume that the comment file is named numbers. $ sort numbers > phone_list b. Translate all occurrences of characters [ and { to the character (, and translate all occurrences of the characters] and} to the character) in the file permdemos.c. (Hint: Ref er to the tr man page.) $ cat permdemos.c |! tr [{}] (()) OR tr [{}] (()) < permdemos.c c. Create a file named book that contains the circumscribe of deuce other files: part1 and part2. $ cat part[12] > bookIf you want to get a all-encompassing essay, order it on our website: OrderEssay.net

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