• This homework assumes some familiarity with the Linux operating system, as acquired from completing Lab 0 and Lab 1.
  
  
• This homework does not require a graphical Linux environment and can be done entirely from an ssh/telnet window (Putty or simple terminal - see How To Connect).
  
  
• You will continue to train with the commands seen in these labs and in the lecture.
  
  
• Commands to be used in this homework:  ls, cd, mkdir, man, pico, alpine, find, grep.

Open a terminal window or a telnet/ssh connection. At the same time, open a text window. You will have to copy and paste the content of the terminal into the text file, just like for Lab 0 and Lab 1. See the Lab 0 for a more detailed explanation about copying. Save the text file under the name hw1.txt. This is what you'll have to submit on Canvas as the result of your homework.

• List all the files in your home directory and display attributes such as the size, date when they were modified, owner, and permissions.
  
  
• List all the files in the folder /usr/bin/ that start with the letters "ma". Do not display the details for them.
  
  
• Locate all the files named math.h in the file system.
  
  
• Display the first two pages of the manual entry for the command less (you will have to copy these to the text file right away since they will disappear once you exit the man page).
  
  
• Change your working directory to the c151 directory created in Lab 0, then into the week1 directory created in Lab 1. Create a directory called hw1. Go back to your home directory.
  
  
• List all the devices (including hard drives) mounted in the file system. Hint: the folder /dev contains this list.
  
  
• Change your current working directory to /usr/include. Find all the files named cmath in this directory, using the command find with the -name option. There should be at least 3 of them.
  
  
• Use the command diff to find out how similar these files are (you don't need to copy all the resulting text if it's more than one page). It's a simple command taking two arguments which are the files to compare. You can find an explanation of this command using the command man or in the lecture demo.
  
  
• Assuming that you are still in the folder /usr/include, suppose that you are looking for a header file containing the prototype for a function called pthread_join. Find the header file that you need to include in your hypothetical program.
  Hint: use the command grep shown in the first demo in the lecture.
  
  
• Read from the textbook (or look them up on the web) about the utilities sort, date, echo, and file. Give an example of using each of them. For the command sort, create a small text file containing several lines and use it to illustrate how the command works.

Upload to Canvas. At this point copy the content of the terminal into the file hw1.txt (all the commands that you executed and the results) or rename the file putty.log as hw1.txt. Submit this file to Homework 1 on Canvas.