Configure Basic Security Controls on a Fedora Linux Server Essay Example for Free

Configure Basic Security Controls on a Fedora Linux Server Essay 1. What is GRUB and why is it important to lock it down? a. GRUB is a bootloader. It is very important to lock this down because of the high access to the kernel and how important aspects can be modified on the fly at any time during the boot up process because it is unprotected by password. 2. Discuss the purpose of granting â€Å"sudo† access. Why is it a good idea not to log in as a root user? a. It gives the person access using the sudo access, superuser capability and allows them to run programs with the security privileges of such. This can cause instability of the kernel or in the hands of a skilled individual compromise the system. 3. If a file is set with the immutable flag, what security controls does this provide for the file? a. Immutable permissions designation prevents a file from being changed, even by someone with root level access. 4. Why do you get a blank window when trying to edit grub with â€Å"vi†? a. You need the correct permissions, or the file has been moved so it is loading nothing. 5. How do you know when you log in as root? a. Terminal prompt goes from [[emailprotected] ~]$ to [[emailprotected] username]# 6. What command do you need to use to install vim? a. apt-get install vim 7. What is iptables and how does this help harden the Fedora Linux Server? a. Iptables is like a rule set or chain of rules. You can use it to basically build a firewall. 8. Why is it important to configure and enable iptables on your Fedora Linux Server? a. To help secure a Linux server that is connected to the internet. 9. What is the difference between the commands ‘cat’ and ‘less’? a. The ‘cat’ command will list everything in a file and it has the capability to merge files. Less will view the contents of a file one page at a time waiting for the user to continue. 10. What is the difference between ‘setfacl’ and ‘getfacl’? How can â€Å"setfacl† help achieve security hardening? a. setfacl set file access control lists. getfacl get file access control lists. Setfacl is used to set up ACL (Access Control Lists). The usage of ACLs offers mechanisms for setting up per-user-permissions of single filesystem objects and provides fine-grained definitions of access restrictions.

Artists in Stained Glass :: Essays Papers

Artists in Stained Glass I. CONCRETE EXPERIENCE I think my interest in the combination of glass, light and color began as a child when I discovered the colorful images created inside a kaleidoscope. Even as an adult, I cannot seem to resist picking up a kaleidoscope and gazing into the viewer as I rotate the tube to change the design of the colored bits of glass. If you walk into my home, it is apparent that I like to decorate with glass. I have glass flowers, marbles, stones, vases, balls, bowls and my favorite, stained glass. I have stained glass windows, birds, flowers, night-lights, candle holders, picture frames, and a jewelry box. I like to attend the various arts and craft festivals and shows in Tulsa so I can enjoy the stained glass art created by the local artisans. In November 1999, I went to the Stained Glass Guild's annual sale and purchased my first large piece of stained glass. It was a beautiful blue, yellow, green and red floral piece. I had purchased several smaller floral pieces in 1998 at Tulsa's Arts and Craft Fall Festival at Tulsa State Fairgrounds and I knew it would look beautiful surrounded by the smaller pieces. I purchased my stained glass windows at the Haskell Antique Auction in 2000. They were removed from a building in England and I like to think that they survived the bombings during World War II and now they hang inside my home. I would not say an exceptionally talented artisan created the windows but the pattern in the glass is unique. The colors sparkle and bring a certain charm to my kitchen and breakfast nook, especially on cold winter days. I recently remodeled my kitchen, breakfast nook and formal dining area. I installed new counters, wallpaper, border, artwork and flooring. In my spare time, I have been working with two friends to make a stained glass still life to hang between the doorway to the formal dining area and the kitchen, breakfast nook area. We made the pattern from the wallpaper border, which depicts a wine bottle, cheese, basket of fruit and some flowers sitting on a counter. The piece has over 200 pieces of cut glass and we are about two-thirds finished.

Finding the Ratio of Moles of Reactants in a Chemical Equation

Finding the Ratio of Moles of Reactants in a Chemical Reaction Purpose: The goal of the lab is to determine the mole ratio of two reactants in a chemical reaction (AgNO3 and K2CrO4). However, the formulas for the products are unknown. Introduction: When determining the molar ratio of a chemical equation, usually the formulas of the reactants and the products are known. With that information, it is particularly easy to determine the ratio. However, since the products and the formulas for the products are unknown, another property of the reaction must be analyzed to find the ratio.This property depends on the amount of the product formed or on the amount of reactant that remains. Properties may include the color intensity due to the product, the mass of the precipitate that forms, or the volume of a gas evolved. In this experiment, the method of continuous variations will be used to determine the mole ratio of two reactants. With this method, the total number of moles of reactants is k ept constant for the series of measurements. The property that is going to be measured is the change in temperature.The temperature change, or the heat produced, will be directly proportional to the amount of reaction occurs and to the total extent of it. The optimum ratio, which is the ratio of the reactants in the balanced chemical reaction, will form the greatest amount of product, or generate the most heat, and will be key to determining the molar ratio. Corrosive liquids, which burn the skin, will be used in the experiment. When this liquid reacts with acid, a toxic gas will formed. Keep away from the gas and protect your skin and clothing.Work in a fume hood or well-ventilated lab. Wear chemical splash goggles, chemical-resistant gloves, and a chemical-resistant apron. Wash hands thoroughly with soap and water before leaving the laboratory. The molar ratio of the reactants is the ultimate goal of the lab. In order to achieve that, secondary observations on the temperature chan ge will have to be made and analyzed. The data and graph made after the data is attained will assist in that. Procedure: 1) Obtain 2 beakers with 175mL of NaClO in one and 175mL of â€Å"Solution B† in another. ) Measure the temperature of each and make sure they are the same. 3) Measure 5. 0mL of NaClO and 45. 0mL of â€Å"Solution B† with the appropriate graduated cylinders and add them to a Styrofoam cup. 4) Stir the solution with a thermometer, and record the max temperature reached. 5) Pour the solution out, rinse the cup, and repeat steps 1-4 using a different ratio of the two substances, keeping the total volume at 50. 0mL. 6) Continue testing various ratios until you have at least 3 measurements on either side of the peak temperature difference.Conclusion: When the formula of the products are unknown in a chemical reaction, experiments must be done to find the mole ratio of the reactants. In our experiment, we used the method of continous variations to determin e to the mole ratio of the two reactants. The property measured was the change of temperature, as indicated in the data table. The method of continous variations keeps the total number of moles of reactants constant through a series of titrations.Each titration varies the mole fraction of each reaction from mixture to mixture by adjusting the ratio of NaClO to Na2SO3, which is also indicated in the data table. Theoretically, the maximum temperature change occurs when teh mole fraction of the reactants is closest to the actual stoichiometric mole ratio, which signals the mole ratio based on the mole fraction in the titration. According to the analysis, the mole ratio is 1:2 in the order of NaClO to Na2SO3.This ratio was concluded by the graph, in which the lines of best fit were extrapolated to intersect at the optimum ratio point. However, there was room for error when measuring the liquids in each titration. The measurements weren't always exact which could affect the change in tem perature. Also, when measuring the temperature it might not have been exact due to inconsistent stirring. Nonetheless, the goal of the lab was to find the mole ratio of the two reactants and it was concluded to be 1:2.

Technology On Our Generation s Future - 1239 Words

Courtney Lofton Professor Watson Philosophy December 16, 2016 Technology on our Generation’s Future Technology is machinery created by scientific knowledge that serves an active role in our industries (Computerhope). Around the world technology has become one of the most popular forms of communication (Computerhope). Starting with regular rotary phones and advancing into Instagram, twitter and facetime. Technology dating back to 1943 when the first computer was created by J. Presper Eckert and John Mauchly, and still has a major impact on our lives while still advancing every day (Computerhope). Technology has had both a negative and positive impact on human lives, although to a certain extent technology has gotten out of hand. In this essay, I will argue how technology plays a huge role in the future of our generation, and the positive and negative effects it will have on our generation’s future. Military robots have a plane like structure and are controlled by remotes (Guizzo, Erico). These military robots serve as attackers and rescuers under our military’s control, although most of these are still under development, some are currently being used (Guizzo, Erico). These robots would be considered a positive technological impact for our generation, because it would be helpful during war. When at war it will be less of a sacrifice to send a robot in to rescue the United States prisoners of war than to send in other soldiers andShow MoreRelatedHow Technology Has Changed Our Visual Learning995 Words   |  4 Pagesuse for of our visual learning. Over there lies the teacher s computer which she uses to make handouts and other learning tools. Over there lies the speaker in, which we have for auditory learning. The future is bright and it s going to be brighter than ever before. Look at all the opportunities we will get in the future through technology, education and jobs. 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