Here are list of 10 very basic commands that can be used to create, edit, copy text in a linux command line.
1. For getting superuser access: sudo su command is used
rachhek@ubuntu:~$ sudo su -> it asks for the user login password. A super user has all the permissions to do administrative tasks.
2. For Switching directories: cd command is used
rachhek@ubuntu:~$ cd / -> switches to the root directory
rachhek@ubuntu:/$ cd home -> switches to the home directory
3. For listing the directories and file structures: ls command is used
learn more about the directory tree in ubuntu here
4. Display message on screen: echo command is used
5. Display the contents of a file: cat command is used.
5. Echo some text directly into a new text file: for eg. echo “Hi there. This is a new file” > hello.txt
6. To append text into an existing file. for eg. echo “This text is appended” >> hello.txt
7. Copy the text of one file to another
cat textfile1.txt >> textfile2.txt
8. Open a file in a text editor: vi hello.txt opend up hello.txt in a new text editor window.
You can use the editor to insert and edit text in the file.
9. Some commands to use inside the text editor
Press Esc -> dd -> it deletes the current line
Press Esc-> u -> it undo’s the previous action
Press Esc -> yy p -> copies the current line
Press : w -> saves the current file
Press : wq -> saves and exits the current file
Press : q! -> discards changes and exits the file.
10. Some useful links to learn more about linux command line
How to install ubuntu server: blog(wikihow)
list of commands: here
linux how to and tips: here
ubuntu help site: here