I/O Redirection, Using Pipes, Bash Completion, Editing Files with vim and Nano

1. I/O Redirection

• Create a file named file1.txt and write “Hello, World!” into it using I/O redirection.
• Create a file named file2.txt and append “How are you?” into it using I/O redirection.
• Display the contents of file1.txt and file2.txt using I/O redirection.

2. Using Pipes

• List all the files in your current directory and use a pipe to pass the output to grep to find all .txt files.
• Use the ps command to show your current processes, and use a pipe to pass the output to grep to find a specific process.

3. History

• Execute the last command again using the history command.
• Execute the 5th command from your history.

4. Bash Completion

• Start typing the name of a file or directory, then use bash completion to finish typing it.
• Start typing a command, then use bash completion to finish typing it.

5. Editing Files with vim

• Create a new file named file3.txt and open it with vim.
• Switch to insert mode and write “This is a test.” Save and quit.
• Reopen file3.txt, delete “a test”, and replace it with “an exercise”. Save and quit.

6. Editing Files with nano

• Create a new file named file4.txt and open it with nano.
• Write “This is another test.” Save and exit.
• Reopen file4.txt, delete “another test”, and replace it with “another exercise”. Save and exit.

Remember, the best way to learn is by doing. Don’t be afraid to experiment and try different things.