The grep command in Linux is a powerful text-search utility used to find specific patterns within files.

In the screenshot, the command grep "heart" poems.txt was executed, instructing the system to search for the word “heart” inside poems.txt and display all matching lines.

The output highlights instances where “heart” appears within the poem, helping the user quickly locate relevant text.

The search is case-sensitive by default, meaning it will only find exact matches of “heart”, not “Heart” or “HEART”. To make it case-insensitive, the -i flag can be added (grep -i "heart" poems.txt).

Additionally, grep can be combined with options like -n to show line numbers or -o to display only matching words.

This command is essential for searching logs, filtering data, and analyzing text files efficiently in Linux environments.

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