How can I exclude directories from grep -R?

1. How do I grep to exclude a folder?
2. How do I use grep with multiple options?
3. How do I use grep to search subdirectories?
4. What options can be used with grep command?
5. How do I exclude a file type in grep?
6. Does grep support regex?
7. How do you use awk?
8. How do you grep multiple lines after a match?
9. How do you grep two consecutive lines?
10. How do I grep a word in multiple directories in Linux?
11. What is the use of awk in Linux?
12. What does grep do in Linux?

How do I grep to exclude a folder?

Using grep with the --exclude-dir flag to exclude multiple directories

1. i - case insensitive search.
2. n - print line number in which pattern is found.
3. R - search recursively.
4. w - I only want whole words - i.e., match "direct" but not "directory"
5. -E - use extended regular expression.

How do I use grep with multiple options?

How do I grep for multiple patterns?

1. Use single quotes in the pattern: grep 'pattern*' file1 file2.
2. Next use extended regular expressions: egrep 'pattern1|pattern2' *. py.
3. Finally, try on older Unix shells/oses: grep -e pattern1 -e pattern2 *. pl.
4. Another option to grep two strings: grep 'word1\|word2' input.

How do I use grep to search subdirectories?

To Search Subdirectories

To include all subdirectories in a search, add the -r operator to the grep command. This command prints the matches for all files in the current directory, subdirectories, and the exact path with the filename.

What options can be used with grep command?

Command-line options aka switches of grep:

• -e pattern.
• -i: Ignore uppercase vs. ...
• -v: Invert match.
• -c: Output count of matching lines only.
• -l: Output matching files only.
• -n: Precede each matching line with a line number.
• -b: A historical curiosity: precede each matching line with a block number.

How do I exclude a file type in grep?

Grep exclude directories, we can use the grep –exclude-dir option, which needs to be used with the grep -R option. Grep –exclude-dir excludes directories matching the given file name pattern from the search. If -R is specified, it excludes directories matching the given filename pattern from the search.

Does grep support regex?

Grep Regular Expression

GNU grep supports three regular expression syntaxes, Basic, Extended, and Perl-compatible. In its simplest form, when no regular expression type is given, grep interpret search patterns as basic regular expressions.

How do you use awk?

awk Scripts

1. Tell the shell which executable to use to run the script.
2. Prepare awk to use the FS field separator variable to read input text with fields separated by colons ( : ).
3. Use the OFS output field separator to tell awk to use colons ( : ) to separate fields in the output.
4. Set a counter to 0 (zero).

How do you grep multiple lines after a match?

To also show you the lines before your matches, you can add -B to your grep. The -B 4 tells grep to also show the 4 lines before the match. Alternatively, to show the log lines that match after the keyword, use the -A parameter. In this example, it will tell grep to also show the 2 lines after the match.

How do you grep two consecutive lines?

grep -xe'[^|]\+|[^|]\+' : only keep lines containing exactly two fields (ie. the city and food fields), grep -e'|bad food$' : keep only lines ending in |bad food , tr \| \\n : turn pipes back into newlines (nb.

How do I grep a word in multiple directories in Linux?

The basic grep syntax when searching multiple patterns in a file includes using the grep command followed by strings and the name of the file or its path. The patterns need to be enclosed using single quotes and separated by the pipe symbol. Use the backslash before pipe | for regular expressions.

What is the use of awk in Linux?

Awk is a utility that enables a programmer to write tiny but effective programs in the form of statements that define text patterns that are to be searched for in each line of a document and the action that is to be taken when a match is found within a line. Awk is mostly used for pattern scanning and processing.

What does grep do in Linux?

What Is grep? Grep is a command-line tool that allows you to find a string in a file or stream. It can be used with a regular expression to be more flexible at finding strings.