i am just wondering what does this piece of code do, what language is it and what meaning it has if [ -e /tmp/filename ]; then file=$(cat /tmp/filename) if [[ "$file" =~ ^/home/[a-zA-Z0-9]+/[a-zA-Z0-9]+\.?[a-zA-Z0-9]*$ ]]; then if [ -e "${file}" ]; then cp "${file}" /tmp chmod 666 /tmp/${file##*/} rm /tmp/filename fi fi fi
Q: Despite being fluent in many languages, what reasons are there for a programmer to continue…
A: Introduction: It's not you who selects what language is used whether you join an open-source project…
Q: Should programmers always aim to create code that is easy to maintain, even if it isn't specifically…
A: Introduction: Software is created by software engineers using technical principles. Using software…
Q: In what steps does the Von Neumann Cycle culminate? When doing each stage, what exactly occurs to…
A: INTRODUCTION In this question we are asked In what steps does the Von Neumann Cycle culminate? When…
Q: Is there a policy in place for information disclosure in the event of a breach in data security?
A: A data breach occurs when the data for which a company/organization is responsible suffers a…
Q: Is there anything further we can do to guarantee the accuracy of data collected in the field?
A: In the field of computers, "data" refers to information that has been converted into a form that is…
Q: How does Edge Computing function, and what is it?
A: One of the key goals of edge computing is to decrease the amount of time spent on long-distance data…
Q: Depending on context, "incremental programme development" may mean a number of things. Add some…
A: introduction: Software engineering uses the incremental development method to create programmes. In…
Q: There are perks to both vertical and horizontal partitioning. Just what are they, exactly?
A: Introduction: Various tables with similar segments were made by isolating horizontal divisions or…
Q: How can we best articulate our ideas about computer forensics?
A: PC technology is a fundamental: Component of everyday life, and it is expanding rapidly, as are PC…
Q: Exactly what is the difference between a prototype and a proof of concept?
A: The answer is given in the below step for the above mentioned question.
Q: How do data processing models factor into the grammar of the English language?
A: Structured English: Is a subset of standard English that facilitates the exact and clear exposition…
Q: The team working on your data warehouse project is probably contemplating whether or not to create a…
A: A repository for data: The data warehouse is a storehouse for decision-making and business…
Q: What are the potential upsides and downsides of using scattered data processing, and why is doing so…
A: Introduction: What are the benefits and drawbacks of distributed data processing that need to be…
Q: So, how accurate is this? When a form is first created, its Text property is initialised with the…
A: Introduction The introduction references to the demonstration of differentiating and employing the…
Q: How does Edge Computing function, and what is it?
A: The process that is referred to as "edge computing" is defined as putting processing power and data…
Q: Make a list using bullet points and another using numbered items as examples.
A: a numbered list example and a second example of a bulleted list a sample numbered list, followed by…
Q: For the sake of argument, let's say you're a systems analyst creating a thorough test strategy.…
A: System Analyst: System analyst is a person who gathers and compiles software-related data. The…
Q: Specifically, what do the foundational ideas of software engineering overlook? Explain?
A: In this question we need to explain the ideas we overlook in software engineering.
Q: The fundamental ideas of software engineering do not account for the gaps in the field. Explain?
A: Software Creation: A systematic, disciplined, and quantitative approach to the design, operation,…
Q: In terms of software engineering, do you have a major worry?
A: It is impossible to successfully complete a software development project without encountering some…
Q: (Algebra: quadratic equations) Design a class named QuadraticEquation for a quadratic equation ax² +…
A: A complete answer in Java Programming language is given below:
Q: When redistributing a route into EIGRP, which parameter must be set? Exit in
A: Enhanced Interior Gateway Routing Protocol (EIGRP): EIGRP is a network protocol that allows routers…
Q: Q2.
A: In salesforce we have SingleEmailMessage class to design the stock email template of text and HTML…
Q: Below, we'll define manual software testing and explore its advantages.
A: Manual Testing: The term "manual testing" refers to a type of software testing in which test cases…
Q: In the past, have data processing models used structured English? What, if anything, does it mean?
A: Sequential structures, decision structures, iterations, and case structures—all articulated in…
Q: Let's pretend you're programming an embedded system, and that you want P2.1 to operate at a 70% duty…
A: By incorporating a real-time operating system into embedded designs, we are able to bring in basic…
Q: In the past, have data processing models used structured English? What, if anything, does it mean?
A: The question has been answered in step2
Q: Members of your data warehousing team are arguing whether or not to create a prototype first. The…
A: Your data warehousing team is debating whether or not a data warehouse should be prototyped before…
Q: How does the concept of an object in the object-oriented model differ from the concept of an entity…
A: Introduction: E.F. Codd created the relational model in 1970. This paradigm, as well as a…
Q: I was wondering what you thought the potential of screencasting would be for technical writing. Can…
A: Technical writing is any expounding on specialized data. It can incorporate, however isn't…
Q: Recognized data transport methods offered by the Transport Layer include the following two examples.…
A: Two well-known data transfer protocols that the transport layer provides are: Transmission Control…
Q: In the years after the American industrial revolution, what happened?
A: A technology revolution typically boosts efficiency and productivity. It might entail structural or…
Q: Do programmers have a moral duty to provide code that is simple to update, even if the client…
A: Indeed, maintaining and modifiable code is a must for computer programmers. Regardless of whether…
Q: Which of these actions meets the requirements for unacceptable conduct? O The program has a glitch.…
A: Glitch in the Program: Glitches/bugs are software mistakes that might result in serious issues with…
Q: Can you recommend a method for bypassing WPS protection
A: When it comes to protecting a wireless home network, WPS is one of the most widely used safety…
Q: Host 2.168.1.1 ce: 192.168.1.1 t: 192.168.2.1 R1 1.1.1.1 ENCRYPTED Source: 192.168.1.1 Dest:…
A: Introduction: Below describe the process of how branch office that is connected to the enterprise…
Q: What two methods of data processing are now used in state-of-the-art systems?
A: The two different data processing approaches that are now used in modern systems are described in…
Q: Assistance with data entry, database administration, and data integrity checking capabilities?
A: People refer to data integrity when discussing the overall quality, completeness, and consistency of…
Q: What two methods of data processing are now used in state-of-the-art systems?
A: This inquiry provides: Information on the two distinct strategies for the processing of data that…
Q: efit to using dynamic programming while making decisions in sequence? What give
A: Introduction: It's just a fancy way of saying that you'll save the values of the subproblems as you…
Q: In terms of software engineering, do you have a major worry?
A: Introduction: Teams of software engineers encounter a variety of difficulties across various…
Q: How many distinct data requests are possible in a decentralized database architecture?
A:
Q: How does the concept of an object in the object-oriented model differ from the concept of an entity…
A: Introduction: E.F. Codd created the relational model in 1970. This paradigm, as well as a…
Q: In vim, when the cursor is on the first letter of a word, you may capitalise it by typing x and then…
A: No, you can not capitalise a first letter of a word in VIM editor by typing x and then p.
Q: Differentiate software engineering from the other branches of engineering.
A: Software engineering includes software project management as a critical component. However, while…
Q: When deciding whether or not to create a data warehouse prototype before putting together a…
A: First , we are going to see the definition of Data warehouse, then we will see the purpose and…
Q: Locate a script or module f
A: 1. New-Object System.Sockets.UdpClient2. $RemoteIP = "10.0.0.5"
Q: How do you distinguish between a domain and a workgroup?
A: Below we will discuss about how domain is different from workgroup.
Q: When do triggers happen, and what are they? I'm confused as to what role they play. In Access 2016,…
A: Institution: What causes a trigger? When a certain command, such as INSERT, UPDATE, or DELETE is…
Q: Explain what a system analysis is and how it works.
A: Systems evaluation is the technique with the aid of using which an individual (s) research a device…
i am just wondering what does this piece of code do, what language is it and what meaning it has
if [ -e /tmp/filename ]; then
file=$(cat /tmp/filename)
if [[ "$file" =~ ^/home/[a-zA-Z0-9]+/[a-zA-Z0-9]+\.?[a-zA-Z0-9]*$ ]]; then
if [ -e "${file}" ]; then
cp "${file}" /tmp
chmod 666 /tmp/${file##*/}
rm /tmp/filename
fi
fi
fi
Step by step
Solved in 2 steps
- Write an address book program that stores your contacts' names and their email addresses. The names and email addresses are originally stored in a file called phonebook.in, in the format: Harry Potter t..d@hogwarts.edu Hermione Granger b..h@hogwarts.edu Ron Weasley r..b@hogwarts.edu Draco Malfoy m..s@hogwarts.edu Severus Snape h..e@hogwarts.edu Albus Dumbledore a..x@hogwarts.edu Your program should read from the file, storing the names and corresponding email addresses in a dictionary as key-value pairs. Then, the program should display a menu that lets the user enter the numbers 1 through 5, each corresponding to a different menu item: 1) look up an email address 2) add a new name and email address 3) change an email address 4) delete a name and email address 5) save address book and exit When the user enters 1, the program should prompt them for a name, and then print the corresponding email address. If there is no dictionary entry under that name, the program should print, "Sorry,…Write a program countfile.c that calculates and prints on screen the number of bytes or number of lines in a file. To print the number of lines in the file myfile.txt, the program is run from the command line with two arguments as follows countfile.exe -l myfile.txt or, to print the number of bytes in the file myfile.txt, it would be run as countfile.exe -b myfile.txt EXAMPLE: Suppose the file myfile.txt contains the following samantha jacob 58 91 Then running countfile.exe -l myfile.txt would print 4 on the screen. And running countfile.exe -b myfile.txt would print 15 on the screen. If as a switch anything other than -l or -b is used, the program should give an error message and exit with code 1. If the file is not found, then it should give a message saying no such file exists, and exit with code 2. If everything runs correctly the program should return 0.Write a program that reads the-zen-of-python.txt and writes each line to UpdatedZen.txt, a new text file. It capitalizes the first character of each line and adds a period to the end of each line before writing it back to updatedzen.txt. the-zen-of-python.txt file contents: beautiful is better than ugly explicit is better than implicit simple is better than complex complex is better than complicated flat is better than nested sparse is better than dense readability counts special cases aren't special enough to break the rules although practicality beats purity errors should never pass silently unless explicitly silenced in the face of ambiguity, refuse the temptation to guess there should be one-- and preferably only one --obvious way to do it although that way may not be obvious at first unless you're Dutch now is better than never although never is often better than *right* now if the implementation is hard to explain, it's a bad idea if the implementation is easy to explain, it…
- By using Linux (Centos 7 or 8) develop a C program to apply the memory times and times, run with this shellprogram, then show the MemToal,MemFree,Active with excel file. Here are the codes for reference. Code no.1: #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> main(int argc, char *argv[]) { void * p[100]; int i,times,msize; if(argc!=3) { times=20; msize=1024; } else { sscanf(argv[1],"%d",×); sscanf(argv[2],"%d",&msize); if(msize>10240) msize=10240; msize=1024*msize; if(times>100) times=100; } for( i=0; i<times; i++) {…What is that potential problem and how would you fix it? explain the problem as comments. #include <stdio.h> int main(int argc, char *argv[]){ FILE *fd; int ch; int fileSize=-1; fd = fopen(argv[1], "r+"); do{ ch=getc(fd); //printf("ch=%c ", ch); fileSize++; printf("fileSize=%d\n", fileSize); } while( ch != EOF); printf("Size of %s is %d\n", argv[1], fileSize); }I have the following code but it is not running correctly! import csvlst = []def save_dict_to_csv(storage, file_name): with open(file_name, 'w', newline = '') as f: f.write(file_name) f.write('\n') for key, value in storage.items(): lst1 = [] lst1.append(str(key)) for val in value : if type(val) == list: for v in val: lst1.append(str(v)) else: lst1.append(str(val)) for i in range(len(lst1)): if i != (len(lst1) - 1): f.writelines(lst1[i] + ',') else: f.writelines(lst1[i]) f.writelines('\n') f = open(file_name) print(f.read()) if __name__ == "__main__": storage = { 101: ["quiz", 12, [1,2,3,4]], 102: ["final", 53, [10, 10, 10, 10]] } res = save_dict_to_csv(storage,…
- Python Pandas: Suppose I have a file with columns I want to specify the spacing so that there are 5 spaces between the columns, how do I do this? file1 12 12.3 9.3 23 3.5 45.6 34 6.1 88.9I have a "user.json" file that looks like this { "something@somewhere.com": "maybe", "john@beatles.uk": "lennonj!", "paul@beatles.uk": "mccartney", "mick@rollingstones.uk": "jaggerm!" } using java script i have to parse this file and then check this email and file conbinations against user input This is the code i m using to parse the file. function lookUpCredentials(filePath, cb) { fs.readFile(filePath, (err, fileData) => { if (err) { return cb && cb(err); } try { const object = JSON.parse(fileData); return cb && cb(null, object); } catch (err) { return cb && cb(err); } }); } lookUpCredentials("./user.json", (err, data) => { if (err) { console.log(err); return; } credentials = data; }); and this is the code i m using to get input from the user app.post('/login', (req, res) => { let username =…3. Suppose you have a text file called notes.txt. You are provided with this notes.txt file on the blackboard. Write a C++ code to display the word that appears most in the notes.txt file and how many times the word appears. This is called word frequency. Your code should automatically find this word that appears most in the text file and also should automatically calculate how many times this word appears. Your code should be such that when I use it to count words from a file with million words, it should tell me which word appears most, this means I do not need to look at the file to know the word first. Your code should also count the number of characters in the word you found and also convert the word to all CAPS. Your code should also count the total number of words in the file. For example, suppose a text file has the following text: Apple Mango Apple Apple • Your code will be recompiled during marking to see if it gives the output you found. • You are to complete this…
- Write a program that will sequentially list numbers from 0 to 50, changing its color depending on the size of the number, for example, for numbers from 0 to 10 it will be green, 11 to 22 red and 23 to 35 blue, etc. Limit the screen output speed to about 1 character / second. In order to change colors, you must first use the GetStdHandle function to get a handle to the console, which is similar to getting a file pointer before working with a file. It is done e.g. as follows: HANDLE hConsole; hConsole = GetStdHandle (STD_OUTPUT_HANDLE); The above functions are defined in windows.h Tip 2: Write a utility to find out the colors corresponding to all combinations from 0 to 255. Tip 3: Instructions and sample program for working with time. C language plz with explanation of codes. thanksWhat would be the content of out.txt after executing the following code? int main() { ofstream file("out.txt"); double num = 3.1415; file << fixed; file << num << endl; file << setprecision(3); file << num << endl; file << setprecision(2); file << num << endl; file << setprecision(1); file << num << endl; return 0;} Group of answer choices 3.14153.143.13 3.14153.1423.143.1 3.1415003.1423.143.1 3.1415003.14153.1423.14from Big Java 6th. Edition. Ch.11 P11.12: the capacitor is represented by the equation v(t) = B(1 - e-t/(RC)) Suppose the parameters of the electric circuit are B = 12 volts, R = 500 Ω, and C = 0.25 μF. Consequently v(t) = 12(1 – e-0.008t) where t has units of μs. Read a file params.txt containing the values for B, R, C, and the starting and ending values for t. Write a file rc.txt of values for the time t and the corresponding capacitor voltage v(t), where t goes from the given starting value to the given ending value in 100 steps. In our example, if t goes from 0 to 1000 μs, the twelfth entry in the output file would be: 110.00 7.02261 Make sure that your program catches the FileNotFoundException that can occur if your input file params.txt cannot be found. Your program should catch this exception, and then prompt the user for a file name again until a valid file is entered. I hbelieve I have everything needed, but I cannot figure out how to write in the…
