Searching and finding#

Warning

This page is under construction!

Questions to think about:#

How can we find files? How can we find things in files?

grep is a contraction of global/regular expression/print. It finds and prints lines in files that match a pattern.
- regular expressions are patterns that can include wildcards
- Usage: grep pattern filename
- grep -w limits to word boundaries
- grep -n prints the line numbers that match
- grep -i makes search case-insensitive
- grep -v inverts the search to output that does not contain the pattern
- grep -E notes that the pattern is an extended regular expression that can contain wildcards
find command finds files!
- -type d or f for directories or files
- -name matches a name, but look out for order of execution! Filenames with wildcards need quotes. For example, find . -name "*.txt"
$() to combine commands. Code inside this runs first!
- For example, wc -l $(find . -name "*.txt")