Homework 12: Look how fast you are now!

Due Friday, May 3, by 9:00 AM


As usual, place the commands you used to solve each of the 5 problems into a file called homework12.
  1. The "uptime" program determines how long a computer is running. Show the time isoptera has been running, but this time use "pretty" format.
  2. The "uptime" program obtains the system uptime from a file in /proc named "uptime". What are the contents of this file?
  3. /proc/crypto contains a list of cryptography algorithms supported by the kernel. How many of these are there?
  4. Produce a list of just the names of the cryptography algorithms, with no other text like "name" or ":". Note that there are a couple repeats. If you look at the details, they are different in some way, but since they have the name, eliminate the duplicates from your list. This is a natural fit for grep, cut, sort, and uniq, but feel free to use whatever you like.
  5. The program "sensors" gives a list of temperatures for each CPU core, and sometimes other hardware as well depending on the system and installed drivers. We made a nasty-looking list from it in class a few weeks ago. Make a nice looking list like the following: 
    48.0°C  41.0°C  48.0°C  42.0°C  40.0°C  44.0°C  45.0°C  39.0°C  42.0°C  39.0°C  39.0°C  39.0°C  41.0°C
46.0°C  45.0°C  46.0°C  44.0°C  44.0°C  45.0°C  44.0°C  44.0°C  37.0°C  35.0°C  38.0°C  41.0°C  39.0°C
    cut and grep will work for the most part, but at the end, pipe your list into the program named column.
Turn in your homework by creating a file named "homework12" with no extension in your home directory, with permissions set so that only you can view the file. This assignment is worth 35 points, 5 from correct naming, 5 from correct permissions, and 5 from each of the problems above. As a reminder, you can set the permissions correctly with this line:
chmod 600 homework12