• Challenge 1: Use grep to find all lines in a file containing the word "apple".

• Challenge 2: Find all lines in a file containing the word "banana", and output the results to a new file called "banana_lines.txt".

• Challenge 3 : To find all lines in a file containing a date in the format "MM/DD/YYYY", use the command:

• Challenge 4: find all lines in a file that start with the word "From:"

• You can use file.txt as an example

• grep has many options that can affect its behavior, and it's important to use the appropriate options for the task at hand. For instance, if you're searching for a pattern in a directory recursively, you should use the -r option to search recursively. If you want to count the number of matches, you should use the -c option. If you want to search for a pattern ignoring the case, you should use the -i option. Make sure to read the man page (man grep) or the help documentation

• When searching for a pattern with grep, it's important to anchor the pattern properly to avoid unintended matches. For a striking example, if you're searching for the pattern the in a file, you may accidentally match words such as them or there if you don't anchor the pattern with word boundaries (\b). Similarly, if you're searching for a pattern that contains special characters such as . or \*, you may need to escape them with a backslash () to avoid unintended matches. Make sure to properly anchor the pattern to match only the desired text.

Bash scripts related to every session of this tutorial will be stored in isolated branches named after their session name.

You can access the main code and the challenge answer key related to every session at their own branch.