What is the command that instructs awk to output the top 20 users' home directories, together with the user login name and user ID, from the passwd file? Ubuntu-Linux is a combination operating system that is both free and open source.
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- user whose ID is beilish is working in a typical Linux system. She issues the command "pwd"and the response is "/home/beilish/alpha/config". She now wants to work in the directory /home/beilish/beta/test. Show three (3) different commands,any of which the user could issue to move from the first directory to the second,and for each command briefly explain how it works. Note: Each command must be independent, not relying on any prior command.In Linux In a Linux system, it is recommended that you login and do all your workdirectly as the root user, this way you have full administrative power, and do nothave to worry about permissions. true or falseOn Linux, can you have the same login name more than once in the output of the “who” command? What would cause that?
- Review the firewall ruleset shown below. If a system at 10.18.100.3 attempts an SSH (Secure shell) connection to the server at 192.168.10.5, what would be the result? (Analyze the rules carefully) Rule Source IP 1 2 3 4 any any 10.18.100.3 any Source Port any any any any Dest IP 192.168.10.5 192.168.10.6 192.168.10.6 any The traffic will be blocked by rule 4 The traffic will be blocked by rule 3 O The traffic will be allowed by rule 2 The traffic will be allowed by rule 1 Dest Port 1443 1521 22 any Action allow allow deny denyIn termina, install the paho-mqtt module with pip using the following command: Sudo pip3 install paho-mqtt Create a new folder by the name of lab_6 and create a new python file mqtt_script_1.py In the file, TYPE the following code: import paho.mqtt.client as mqtt # The callback for when the client receives a CONNACK response from the server. def on_connect(client, userdata, flags, rc): print("Connected with result code "+str(rc)) # Subscribing in on_connect() means that if we lose the connection and # reconnect then subscriptions will be renewed. client.subscribe("etec224_mqtt_test/") # The callback for when a PUBLISH message is received from the server. def on_message(client, userdata, msg): print(msg.topic+" "+str(msg.payload)) client = mqtt.Client() client.on_connect = on_connect client.on_message = on_message client.connect("broker.emqx.io", 1883, 60) client.loop_forever() Create another file py and add the following code to it.…A company has implemented a discretionary access control system for important documents and programs on a shared Linux server. Figure 1 shows the current implementation of the DAC system. It only applies to the directory /opt/company (you can ignore all files/directories that are not within this directory). The list of users is shown in the output from the firstls command; the members of each group is shown in the output of the tail command; the permissions are shown in the output of the second ls command. Assume the files are the objects, the subjects are the five users and there are four access rights: own, read, write and execute. Refer to Figure 4.2 and Table 2 in the textbook and complete the following subquestions I. Draw the Access Control Lists that illustrate the implementation on the Linux server; II. Draw the Capability Lists that illustrate the implementation on the Linux server; III. Build the Authorization Table that illustrate the implementation on the Linux server.
- Is it possible for the same login name to appear more than once in the output of the "who" command on Linux? What might be the source of this?How do you set permissions in Linux using PuTTY for each shared directory so only the users and groups have access to their shared directory. By settting the group ID for each shared folder so that all subdirectories and files inherit the shared folder permissions.In Linux Op Sys, what is the difference between locate and find commands?
- There are certain Linux commands that are almost identical to their corresponding Unix ones. Why does this keep happening over and over again?What would be the absolute pathname (for a Linux System) for a file name keybd located under the root directory’s “dev” subdirectory?Given a linux file mode (permissions) as an integer, return the permission string that the mode represents. Example 1: mode = 511 511 == Ob111111111 permissons = 'rwxrwxrwx' Example 2: mode = 424 424 == ob110101000 permissions = 'rw-r-x---' def perms(mode): pass