terminal

Welcome to Linux Practice Terminal!

Type "help" to see available commands.

user@linux:~$

Advanced grep

Master grep flags: -n for line numbers, -v for inverse match, and -c for count.

Step 1

Review: search for "ERROR" in the log file.

Type: grep ERROR documents/log.txt

grep ERROR documents/log.txt

Step 2

Use -n flag to show line numbers with ERROR matches.

Step 3

Use -v flag to show lines that do NOT contain "ERROR".

Step 4

Use -c flag to count how many lines contain "ERROR".

Step 5

Combine -n and -i flags to search "info" case-insensitively with line numbers.

Step 6

Combine -v and -c to count lines that do NOT contain "ERROR".

Step 7

Apply -n to a different file: find "@" in contacts.txt with line numbers.

Step 8

Count how many contacts use "example" domain.