##Learn From Internship [Since 11 October 2022]
CVE-2021-44228: Proof-of-Concept for Critical Apache Log4j Remote Code Execution Vulnerability Available (Log4Shell) – This issue happens on 6 December 2021.
Window Command Prompt: • shutdown –s –t 5: It means that the computer will shut down after 5 seconds.
Ubuntu Terminal Learning (cowsay): • uname –a: uname is used to print basic system information. It is usually invoked with the -a option to display all available information. • apt-get update / upgrade: Update installer. • apt-get install: Install package. • ip addr: Show IP address. • ip addr |cowsay|: Show IP address by using cowsay. • lsb_release -a: Show the version of Ubuntu, release, and codename. • -verbose: It just outputs a load of text telling you what it's currently doing. • cowsay -e TT huhu: Change the cow’s eye to ‘TT’ and let cow say ‘huhu’., • cowsay -f turtle hello: Change cow to turtle and let turtle say ‘hello’. • >: Copy the output into the file and become contents with replace its contents. • >>: Copy the output into the file and become contents without change its contents. • ssh-keygen: Used to generate public key and private key for SSH. • id_rsa: A private key. The default name for SSH key pairs is id_rsa , and that name will allow an SSH client to locate the key automatically. • id_rsa pub: A public key. • git status: To show the status of each files. • git commit: Captures a snapshot of the project's currently staged changes. • npm install: To install dependencies of the project. • npm run debug/ npm run start: To run the project.
Vocabulary:
| No | Command | Explanation |
|---|---|---|
| 1. | sudo | Allows a permitted user to execute a command as the superuser or another user, as specified by the security policy. |
| 2. | apt | Command Line Interface |
| 3. | dpkg | dpkg is the software that forms the low-level base of the Debian package management system. |
| 4. | grep | Like the search function. |
| 5. | clear | To clear all the commands in the terminal. |
| 6. | man | This is a manual to get an explanation. |
| 7. | cat/ less/ more/ vi | Concatenate files and print on the standard output. by different ways. |
| 8. | -l | List out. |
| 9. | history | List out all the commands inserted before. |
| 10. | npm | npm is a package manager for the JavaScript programming language maintained by npm. |
| 11. | init | Initializer. To set up a new or existing package. |
| 12. | cd | Get into the directory if with the directory name. If not, then it will back to home page. |
| 13. | git | To keep track every changes of the file. |
| 14. | drwx | d:directory; r:read; w:write; x:execute |
| 15. | ||
| 16. | ||
| 17. |
Step for getting changes from remote: 1: git fetch origin 2: git pull origin [branch name]
Step for pushing changes into remote: 1: git status 2: git add [file name] 3: git commit -m "[commit messages]" 4: git push origin [branch name]