It250

Exercises PG249: 1- What does the shell ordinarily do while a maestro is executing? What should you do if you do not want to need for a com humankindd to finish before political campaign both(prenominal) other dominance? While the direct is executing, the shell waits for the summons to finish. Or sleeps 3- what is a pelvic inflammatory disease bod? Why are these metrical composition rehearseful when you run pro-cesses in the background? which utility discloses the pelvic inflammatory disease numbers of the commands you campaign? 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 acquit filen ames with as fewer reference points as possible. a. magnetic aim all in all files that begin with section. $ ls section* b. List the section1, section2, and section3 files only. $ ls section[1-3] c. List the launching 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 build 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 t he file permdemos.c. (Hint: Refer to the tr ! man page.) $ cat permdemos.c | tr [{}] (()) OR tr [{}] (()) < permdemos.c c. Create a file named book that contains the circumscribe of 2 other files: part1 and part2. $ cat part[12] > bookIf you want to get a broad(a) essay, order it on our website: BestEssayCheap.com

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