How do you grep and show more lines?

How do you grep and show more lines?

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 either of two strings?

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.

Can you use grep to search multiple strings?

You can grep multiple strings in different files and directories. The tool prints all lines that contain the words you specify as a search pattern. In this guide, we will show you how to use grep to search multiple words or string patterns.

How to show lines before and after in grep?

If you want the same number of lines before and after you can use -C num. grep -C 3 foo README.txt This will show 3 lines before and 3 lines after.

Can you match two regexps in one line in grep?

You simply can’t do that in one call to grep, you have to either write code to escape all RE metachars before calling grep: which again are poor choices whereas with awk you simply use a string operator instead of regexp operator: Now, what if you wanted to match 2 regexps in a paragraph rather than a line? Can’t be done in grep, trivial in awk:

How to grep two strings in one line in Python?

To get the line that contains the strings: FROM python and as build-python then use: Then the output will show only the line that contain both strings: It’s one of the quickest grepping tools, since it’s built on top of Rust’s regex engine which uses finite automata, SIMD and aggressive literal optimizations to make searching very fast.