Hi

 

 

I'be been following some linux basics and am stuck with 4 exercises around expressions

 

 

 

1.Match this string at the end of a line: EOF$

 

solution ******

 

I tried

 

$EOF\$

 

$EOF\W

 

 

 

2. Match all lines that start with $, followed by any single digit,

 

followed by $, followed by one or more non-whitespace characters

 

 

solution *********

 

I tried $\$\d\s+

 

 

3. Match all of these emails while also adding the username and the domain name (not the TLD) in separate groups (use \w): hello@tryhackme.com, username@domain.com, dummy_email@xyz.com

 

solution ************.***

 

I tried \w{4-11}@\w+.com

 

 

4. match every possible IPv4 IP address (use metacharacters and groups)

 

solution ***{*,*}*.*{*}**{*,*}

 

 

Thanks for any tips :)