Grep my file

In our second GREP command tutorial, you can find even more examples of how to use this Linux command. I have two files with content. I would like to use grep to find all matching rows of file1 content, and that matches file2 row of content and display.

I'm a linux novice and im using the grep function to search for the number 1. How do i go about specifing the search so it's just car1 and wheel1?

Many Thanks. For what it is worth you may want to look into using the "strings" command for searching for strings in a binary, as it is explictly designed for that. You need a better patern. Tis is a little bit tricky, as some choies onclude a space, a tab, or a EOL. Thank you! The recursive capabilities of the "grep" program helped me find the information I'd sought in no time. This feature is only available to subscribers. Get your subscription here. Log in or Sign up. On this page The GREP command - an overview The basic grep command syntax How to use the grep command for searching in a file Recursive use of grep Using grep to search only for words Using grep to search two different words Count lines for matched words Grep invert match How to list only the names of matching files How to make grep command handle multiple search patterns How to limit grep output to a particular number of lines How to make grep obtain patterns from file How to make grep display only those lines that completely match the search pattern How to force grep to not display anything in the output How to make grep display name of files that do not contain search pattern How to suppress error messages produced by grep How to make grep recursively search directories How to make grep terminate file names with NULL character How to use GREP to find errors in log files More GREP command examples.

Suggested articles. By: harshal sarode at: By: ramakrishna at: Hi Sir, I wants to get the content in beetween the particulers word like It starts with subject and ends with subject and i wants the content in between that find. By: Stan Brow at: Sounds like an awk task to me. By: dkolb at: Not all content has a match for file1 and file2, but I would like the match to be correct. Any advise for this? By: Daniel at: By: Brandon at: I need some help with grep I have two.

By: Stan Brown at: By: Tiago at: It helped me a lot! But the Finder searches only inside files it has indexed, and it ignores hidden system files unless you expressly choose to search for visible and invisible files and add your System folder to the search.

Search for Walden Pond, and it returns all files that contain either Walden or Pond. Using grep also gives you access to regular expressions. These combinations of letters, numbers, wild cards, and other special characters let you find much more than mere words. You can search for just about any string of characters: IP addresses in log files; phone numbers in contact lists; or specific strings containing a series of numbers, letters, or other characters. The grep command looks inside one or several files for the string, or text, you specify.

This useful file contains a list of network port numbers for commonly used services. The command displays each line that contains your search string:.

And so on. This command searches all the files in the current directory for the word Walden, returning the following:.

As the above example shows, the search returns several matches. The first, Walden. The grep command calls such proprietary file types binary files. The next examples come from plain-text files, for which grep can display the results. You see the file name, followed by a match of the search string in its context. You can search for any multiword text string by enclosing the string in single quotes.

In the previous example, grep ran in a specific folder, checking all the files it contained. The output includes lines with mixed case entries.

If we use the -i operator to search files in the current directory for phoenix , the output looks like this:. 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.

In the example below, we also added the -w operator to show whole words, but the output form is the same. You can use grep to print all lines that do not match a specific pattern of characters. To invert the search, append -v to a grep command. The terminal prints all lines that do not contain the word used as a search criterion. Use -i to ignore case to exclude completely the word used for this search:.

The grep command prints entire lines when it finds a match in a file. To print only those lines that completely match the search string, add the -x option. The output shows only the lines with the exact match. If there are any other words or characters in the same line, the grep does not include it in the search results.

Do not forget to use quotation marks whenever there is a space or a symbol in a search pattern. Here is a comparison of the results without and with the -x operator in our grep command:. Sometimes, you only need to see the names of the files that contain a word or string of characters and exclude the actual lines.

To print only the filenames that match your search, use the -l operator:. The output shows the exact filenames that contain phoenix in the current directory but does not print the lines with the corresponding word:. As a reminder, use the recursive search operator -r to include all subdirectories in your search. When grep prints results with many matches, it comes handy to see the line numbers.

Append the -n operator to any grep command to show the line numbers. We will search for Phoenix in the current directory, show two lines before and after the matches along with their line numbers. Individual files, such as log files, can contain many matches for grep search patterns. Limit the number of lines in the grep output by adding the -m option and a number to the command. In this case, the terminal prints the first two matches it finds in the sample file.

If you do not specify a file and search all files in a directory, the output prints the first two results from every file along with the filename that contains the matches.