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adds and apt section to sudomateo's exercises

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waldek 2021-04-10 15:38:01 +02:00
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certificates/essentials/exercises_sudomateo.md
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5. `chmod 4664 file06` 5. `chmod 4664 file06`
6. `chmod 1444 file06` 6. `chmod 1444 file06`
5. Run the command `ls -l`. You should see output similar to the following. 5. Run the command `ls -l`. You should see output similar to the following.
``` ```
$ ls -l $ ls -l
total 0 total 0
@ -42,6 +43,7 @@ total 0
7. Run the command `rm -f file0*` to remove all six files that were created earlier. Verify the files were removed using the command `ls -l`. 7. Run the command `rm -f file0*` to remove all six files that were created earlier. Verify the files were removed using the command `ls -l`.
8. Run the command `tar -zxvf /tmp/managing-files.tgz -C /tmp/managing-files` to extract the contents of your archive back into the `/tmp/managing-files` directory. 8. Run the command `tar -zxvf /tmp/managing-files.tgz -C /tmp/managing-files` to extract the contents of your archive back into the `/tmp/managing-files` directory.
9. Verify the files were restored correctly using the command `ls -l`. You should see output similar to the following. **NOTE: `tar` does not restore special permissions (SUID, SGID, sticky bit) so you will only see the read, write, and execute permissions.** 9. Verify the files were restored correctly using the command `ls -l`. You should see output similar to the following. **NOTE: `tar` does not restore special permissions (SUID, SGID, sticky bit) so you will only see the read, write, and execute permissions.**
``` ```
$ ls -l $ ls -l
total 0 total 0
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# Managing software [source](https://lsa-i.sudomateo.com/managing-software/) # Managing software [source](https://lsa-i.sudomateo.com/managing-software/)
## Apt
1. Install the `screen` package using the command `sudo apt install screen`. Press ++y++ if prompted.
2. Verify the screen package is installed using the command `sudo apt list screen`. You should see the matching output.
3. Remove the `screen` package using the command `sudo apt remove screen`.
4. Verify the screen package is removed using the command `sudo apt list screen | grep installed`. You should see no matching output.
12. Run the command `sudo apt install nginx` to install the nginx webserver. Press ++y++ if prompted.
13. Run the command `sudo systemctl status nginx` to see the status of the nginx webserver. It should show inactive or dead.
14. Run the command `sudo systemctl start nginx` to start the nginx webserver.
15. On your local workstation, open a web browser and navigate to `http://127.0.0.1:8080`. You should see an nginx test page.
16. Run the command `sudo systemctl stop nginx` to stop the nginx webserver.
17. Try to reload the web page on your local workstation. It should not load this time.
18. Verify the nginx service is not running using the command `sudo systemctl status nginx`.
19. Practice these and other commands until you feel comfortable with them.
20. When finished, use the `exit` command to exit the shell and logout.
## Yum
1. Install the `screen` package using the command `sudo yum install screen`. Press ++y++ if prompted. 1. Install the `screen` package using the command `sudo yum install screen`. Press ++y++ if prompted.
2. Verify the screen package is installed using the command `sudo yum list installed | grep -i screen`. You should see the matching output. 2. Verify the screen package is installed using the command `sudo yum list installed | grep -i screen`. You should see the matching output.
3. Remove the `screen` package using the command `sudo yum remove screen`. 3. Remove the `screen` package using the command `sudo yum remove screen`.
4. Verify the screen package is removed using the command `sudo yum list installed | grep -i screen`. You should see no matching output. 4. Verify the screen package is removed using the command `sudo yum list installed | grep -i screen`. You should see no matching output.
11. Run the command `sudo yum install epel-release` to install the EPEL repository.
12. Run the command `sudo yum install nginx` to install the nginx webserver. Press ++y++ if prompted.
13. Run the command `sudo systemctl status nginx` to see the status of the nginx webserver. It should show inactive or dead.
14. Run the command `sudo systemctl start nginx` to start the nginx webserver.
15. On your local workstation, open a web browser and navigate to `http://127.0.0.1:8080`. You should see an nginx test page.
16. Run the command `sudo systemctl stop nginx` to stop the nginx webserver.
17. Try to reload the web page on your local workstation. It should not load this time.
18. Verify the nginx service is not running using the command `sudo systemctl status nginx`.
19. Practice these and other commands until you feel comfortable with them.
20. When finished, use the `exit` command to exit the shell and logout.
## General
5. Run the command `ps aux` to view all of the processes currently executing on the system. 5. Run the command `ps aux` to view all of the processes currently executing on the system.
6. Run the command `top` to view all of the processes and their resource usage. Notice how the output refreshed every 2 seconds. Press ++q++ to quit when done looking around. 6. Run the command `top` to view all of the processes and their resource usage. Notice how the output refreshed every 2 seconds. Press ++q++ to quit when done looking around.
7. Run the command `sleep 60`. Press ++ctrl+c++ to quit the command early. 7. Run the command `sleep 60`. Press ++ctrl+c++ to quit the command early.
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1. Verify the PID exists using the command `ps aux | grep PID` where `PID` is the PID from earlier. 1. Verify the PID exists using the command `ps aux | grep PID` where `PID` is the PID from earlier.
2. Use the `kill -9 PID` command where `PID` is the PID from earlier to send a `SIGKILL` command to that process. 2. Use the `kill -9 PID` command where `PID` is the PID from earlier to send a `SIGKILL` command to that process.
3. Run the `jobs` command to verify your background process was killed. 3. Run the `jobs` command to verify your background process was killed.
11. Run the command `sudo yum install epel-release` to install the EPEL repository.
12. Run the command `sudo yum install nginx` to install the nginx webserver. Press ++y++ if prompted.
13. Run the command `sudo systemctl status nginx` to see the status of the nginx webserver. It should show inactive or dead.
14. Run the command `sudo systemctl start nginx` to start the nginx webserver.
15. On your local workstation, open a web browser and navigate to `http://127.0.0.1:8080`. You should see an nginx test page.
16. Run the command `sudo systemctl stop nginx` to stop the nginx webserver.
17. Try to reload the web page on your local workstation. It should not load this time.
18. Verify the nginx service is not running using the command `sudo systemctl status nginx`.
19. Practice these and other commands until you feel comfortable with them.
20. When finished, use the `exit` command to exit the shell and logout.
# Configuring hardware [source](https://lsa-i.sudomateo.com/configuring-hardware/) # Configuring hardware [source](https://lsa-i.sudomateo.com/configuring-hardware/)