Chapter01s07

[chis]

I feel like this line could use some extra explanation, I saw nothing related to this in the preceding pages.

ssh ${USR}@${SRV} "grep -v '^$' /etc/selinux/config|grep -v '^#'" >> ${OUT}-${SRV}

Specifically

'^$' 

- I assume this is the expression that removes whitespaces, but how or why and where is this mentioned in the preceding guide.

If it is expected to do our own research, that is fine, but it does not suggest you should do this.

Please advise.

Thanks.

[Chetan_Tiwary_]

Hi @chis , thanks for the feedback, Let me check it and get back to you.

[Chetan_Tiwary_]

ok @chis , I think you are talking about step 2.2 :

The command grep -v '^$' /etc/selinux/config | grep -v '^#' searches the /etc/selinux/config file on the remote server for lines that are not empty and do not start with a # character (which usually indicates a comment). The -v option in both grep commands inverts the match, meaning it finds lines that don't match the specified patterns. This ensures that only non-empty, non-comment lines are extracted from the configuration file.

I will file an improvement request to ensure there is an explanation for this script in the course steps.

Thank you for this feedback!

[chis · Accepted solution]

Hi Chetan,

Thank you for providing further information.

I had conflicting understanding of the $ flag.

[Chetan_Tiwary_]

pleasure @chis !