Q1 What does the following command do? Please explain and run the command on your own system & provide an example of the results. ┌──(kali㉿kali)-[~] └─$ uptime What does the option -s show in the following command? Please explain and run the command on your own system & provide an example of the results. ┌──(kali㉿kali)-[~] └─$ uptime -s
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Q1
What does the following command do? Please explain and run the command on your own system & provide an example of the results.
┌──(kali㉿kali)-[~]
└─$ uptime
What does the option -s show in the following command? Please explain and run the command on your own system & provide an example of the results.
┌──(kali㉿kali)-[~]
└─$ uptime -s
Q2
What do the -b and -n 2 options do to the top command?
Why were those options used in the Lab Mod 5 Lab A?
┌──(kali㉿kali)-[~]
└─$ top -b -n 2
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- -For external input, which of the following instructions is used? Aşayuakiieiuemangisi bir ueyişkeT upr ueyinui Osetlocale Ofor Ocout Oprintf Ocin -Aşayuakiieiuemangisi bir ueyişkeT -Which of the following does not represent a variable type? Ofloat vs Ochar Odouble OintWhich of the following statement is true ? Choose an answer A The –x option displays the lines of code in the script but does not execute the command line B The –v option displays the lines of code in the script but does not execute the command line C The –x option displays the lines of code in the script at the time of execution D The –v option displays the lines of code in the script at the time of executionWhich command could you use to see a list of all environment and user-defined shellvariables as well as their current values?a. ls /varb. envc. setd. echo
- Which of the following statements is true? (Choose all that apply.)a. If /etc/at.allow exists, only users listed in it can use the at command.b. If /etc/cron.allow exists, only users listed in it can use the cron command.c. If /etc/cron.deny exists and /etc/cron.allow does not exist, any user not listed in/etc/cron.deny can use the cron command.d. If /etc/cron.allow and /etc/cron.deny exist, only users listed in the former can use thecron command, and any users listed in the latter are denied access to the croncommand.e. If a user is listed in both /etc/cron.allow and /etc/cron.deny, then /etc/cron.denytakes precedence and the user cannot access the crontab command.Which INT 21h functions shown in this chapter probably will not work under Windows NT,2000, or XP with a restricted user profile?Using echo command, answer how the end of line (also called new line) character is displayed. NOTE: Shell gives special meaning to certain characters like *, ?, \ and others. To make shell not to give special meaning to that character, you have to put a \ in front of it. This is called quoting character. Therefore, you have to quote the character \ by putting a \ in front of it like \\ in order for the echo command to display it. Read more about it quoting character in your textbook. The end of line character is the representation of the “enter” key. The ASCII character code for the “enter” key is not a displayable single character like the letter ‘X’ for example. Hence, the system displays it differently.
- Hi, I cannot fix the 5 errors after trying to fix the code. Even after fixing the code it is giving me more errors which I don't understand how to fix. I tried reordering #include "student.h" and #include "bubble.h" in studentMain.cpp but it gave me more errors. Is this happening because I am compiling with the wrong command, I am compiling it all together like this: g++ studentMain.cpp bubble.cpp bubble.h student.h grades.txt. I have the modified code below and I can only edit the code in the studentMain.cpp file I cannot edit the code in the files bubble.cpp, bubble.h, and student.h: //studentMain.cpp #include <stdio.h>#include <stdlib.h>#include "student.h"#include "bubble.h" int main(){ // Create an array of 19 student pointers student *students[19]; // Allocate space for each student in the array for (int i = 0; i < 19; i++) { students[i] = (student *)malloc(sizeof(student)); } // Read in the data from the file FILE *fp = fopen("students.txt", "r"); if…Use the code below to answer the questions: - Open a second terminal and send it a signal that invalidates the while() loop condition -What command did you use in the second terminal? Here is the code: #include <stdio.h>#include <stdlib.h>#include <unistd.h>#include <errno.h>#include <signal.h> volatile sig_atomic_t got_usr1; void sigusr1_handler(int sig){ (void)sig; // silence unused variable warning got_usr1 = 1;} int main(void){ struct sigaction sa; got_usr1 = 0; sa.sa_handler = sigusr1_handler; sa.sa_flags = 0; sigemptyset(&sa.sa_mask); if (sigaction(SIGUSR1, &sa, NULL) == -1) { perror("sigaction"); exit(1); } while (!got_usr1) { printf("PID %d: working hard...\n", getpid()); sleep(1); } printf("Done in by SIGUSR1!\n"); return 0;}Using your understanding of Shell Variables, answer the following with Linux commands:a. Use echo to display Hellp followed by your username.b. Create a variable Sosket with a value of 20.c. Destroy your Sosket variable.d. Write a Linux command to display the last 2 commands typede. Write a single line command to List (with Is) all files starting with file and ending in a number.f. What command character can be used to get regular expressions in Linux that matches the end of a string?g. Differentiate between SHISTFILE and SHISTSIZE
- Hi, it is still giving me the same 5 errors as last time even after modifying the code. I tried reordering #include "student.h" and #include "bubble.h" in studentMain.cpp but it gave me more errors. Is this happening because I am compiling with the wrong command, I am compiling it all together like this: g++ studentMain.cpp bubble.cpp bubble.h student.h grades.txt. I have the modified code below and a reminder that I can only edit the code in the studentMain.cpp file: //studentMain.cpp #include <stdio.h>#include <stdlib.h>#include "student.h"#include "bubble.h" int main(){ // Create an array of 19 student pointers student *students[19]; // Allocate space for each student in the array for (int i = 0; i < 19; i++) { students[i] = (student *)malloc(sizeof(student)); } // Read in the data from the file FILE *fp = fopen("students.txt", "r"); if (fp == NULL) { printf("Error opening file\n"); return 1; } for (int i = 0; i < 19; i++) { fscanf(fp, "%s…What does the following command do? $ mkdir dir dir/dir_01/dir_02What will be the value in EAX after the following lines execute?mov eax,30020000hdec ax