The tree command prints all files/directories contained in the current di-rectory as a tree. If we run ./tree from the cs214 directory, we shouldsee:hw1factor.c- grep.c- monster.c- sort.cuniq.chw2find.c- 1s.cMakefile- tree.cThe first line of output is always "." to denote the current directory.tree recurses into directories to print all files/directories within them. Foreach subdirectory, two spaces of indentation are added. For example, if wehad a file hw1/test/src/foo.c, tree would print:3hw1- test- src- foo.cFiles/directories within each subdirectory should be sorted with the samelexicographic order as in 1s.

In Linux, a tree is defined as a recursive directory listing program that generates a depth-indented…

Answered: The tree command prints all…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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implement a python code that is a filesystem using a tree data structure. If the specific path does not exist, disregard that file using the code template given in this pastebin link: https://pastebin.com/NuPaPAFT The input format is as follows, the first line is the name of the root directory second line is the number of subdirectories that follows For the next files that follows, the format is: Filename-root node,next path,next path,... Please note the output format. Sample input 1: C12Users-CWindows-CProgramFiles-CAdobe-C,ProgramFilesSteam-C,ProgramFilesferdie-C,Usersjohn-C,Usersguest-C,UsersFirmware-C,WindowsSystem-C,WindowsDocuments-C,Users,ferdieDownloads-C,Users,ferdie Output: C Users ferdie Documents Downloads john guest Windows Firmware System ProgramFiles Adobe Steam
In this task, we would like to generate a keyed hash (i.e. MAC) for a file. We can use the “-hmac” option (this option is currently undocumented, but it is supported byopenssl). The following example generates a keyed hash for a file using the HMAC-MD5 algorithm. The string following the “-hmac” option is the key. “openssl dgst -md5 -hmac "abcdefg" filename” Please generate a keyed hash using HMAC-MD5, HMAC-SHA256, and HMAC-SHA1 for any file that you choose. Please try several keys with different lengths. 1. Do we have to use a key with a fixed size in HMAC? 2. If so, what is the key size? 3. If not, why?
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q6) Which of the following linked list can move only in one direction to access the data of the node? a. Single linked list b. Circular Double linked list c. None d. Double linked list
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You can make this code connection functions between P2P machines: import threading import socket import pickle import time import struct import hashlib import os class FileManager(object): def __init__(self): self.files = {} self.download_path = "" def hash_data(self, data): hasher = hashlib.md5() hasher.update(data) return str(hasher.hexdigest()) def hashFile(self, filepath): hasher = hashlib.md5() try: with open(filepath, "rb") as afile: buf = afile.read() while len(buf) > 0: hasher.update(buf) buf = afile.read() return hasher.hexdigest() except: print("Couldn't find/hash file " + filepath) def refresh(self): for i in list(self.files): if self.files[i]["path"] is not None: if not os.path.exists(self.files[i]["path"]): print(…
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Which of the following concepts make extensive use of arrays?a) Binary treesb) Scheduling of processesc) Cachingd) Spatial locality
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The tree command prints all files/directories contained in the current di- rectory as a tree. If we run ./tree from the cs214 directory, we should see: hw1 - factor.c - grep.c - monster.c - sort.c - uniq.c hw2 - find.c 1s.c Makefile - tree.c