• Installation of bash environment
  • Why prioritizing processes is necessary?




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    Bog'liq
    Linux This Book Includes 4 Manuscripts The Underground Bible

    Why prioritizing processes is necessary? 
    When a user is dealing with a lot of background processes that are
    constantly functioning this may decrease the processing speed of other
    processes. For this reason, administrators prioritize anti-virus software's at
    first level of the priority. With this method, any boot level executions can be
    eliminated. 
    However, a lot of system administrators don't take this problem seriously
    and make hackers exploitation easy. Below is the example command that
    explains how to prioritize the processes that are present. 
    example@ linuxwar : ulimit PID 234 5
    Always remember that PID is the most necessary thing that needs to be
    used to prioritize. 
    15) Test
    Shellcode consists of a lot of loop and conditional codes. Before
    experimenting with these repetitive tasks with a system shell it is a good
    practice to check them in the old shell. For this purpose, the test command
    is introduced. 
    Below is the command that takes care of the testing: 
    example@ linuxwar : test PID 3634
    With this, we have completed an explanation about some of the built-in
    shell commands that are present in Linux systems. This should have given a
    good overview of the hacking environment to you. 
    In the next section, we will discuss some of the program concepts that need
    to be learned before writing the shell script. But before learning about it let
    us learn about the installation of a bash shell, the most famous shell
    environment. 
    Installation of bash environment


    1) you can use wget to get the system files that are present in the server. The
    below command will download the files from the mirror websites and will
    help users install them in their system.
    wget bash.com/download
    2) in the next step you need to mention or input the configuration of the
    system that you are using. Otherwise, it may not get installed. 
    3) After installation, you may need to check the settings and input the
    default directory. Normally it is entered as the root directory. Also, the shell
    versions can be easily known using the help command. 
    With this, we have installed the bash environment and good to go to learn
    about some fundamentals of shell programming. Remember that these
    topics very much coincides with python scripting which is another good
    alternative scripting language for hackers. 

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