Neglecting files and failing to remember the filenames are most normal in us. I will certainly never ever think somebody out there have a photo memory and has never ever experienced missing some of the files he had in fact created prior to. Without a doubt, all of us have actually gone through that frightening experience specifically if the documents that is losing out on is so valuable to us.
Nevertheless, if you remain in Linux, the whole thing would certainly be much more difficult as well as numerous than it stays in Windows especially if you are simply a regular customer dependent on the GUI interface. Linux is extra on performing commands from a shell. The -l switch outputs just the names of data in which the message occurs rather of each line having the message , the -i switch ignores the situation, as well as the -r comes down right into subdirectories.
To discover documents consisting of search phrases, linux has a powerful command called grep, which you can make use of to uncover the lines inside any kind of data or a listing of data.
So, to search for text within thousands of files contained in a hierarchy of folders, you only need a single line of command that you can run on a terminal emulator. Of course, you can also search just for numbers. Skip to content Tweet Share.
This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Alternatively, You can also also use the find command to search files with specific string.
You can also specify multiple strings to search using -e switch. This is similar to egrep command. You can search strings in files matching the file name criteria.
If you want to exclude some files matching file name criteria. You can exclude some files using —exclude option in command. For example, do not search file ending with. You can also exclude some directoires to skip search inside it. In the first example, I will search for the user "tom" in the Linux passwd file.
You have the option to instruct grep to ignore word case, i. If you have a bunch of text files in a directory hierarchy, e. This will perform a recursive search operation trough files for the string " Here, you would see the result for mydomain. The inclusion of the file names in the output data may be easily suppressed by using the -h option as explained below : grep -h -R "mydomain.
Given below is the sample Output:. When you are searching for abc, grep will match all sorts of things, viz. You can compel the grep command to select only those lines that contain matches to form whole words those that match only abc word , as shown below:. The grep command has the ability to report the number of times a particular pattern has been matched for each file using the -c count option as shown below :.
In addition, users may use the '-n' option preceding each output line with the number of the line in the text file from which it was obtained as shown below :. Users may make use of the -v option to print inverts the match, which means it would match only those lines that do not contain the given word. For instance, print all lines that do not contain the word par by using the following command:.
You must use the -l option to list file names whose contents mention a particular word, for instance, the word 'primary', using the following command:. Lastly, you have the option to compel grep to display output in specific colors by using the following command:.
There could be situations wherein you might want to search multiple patterns in a given file or set of files. In such scenarios, you should use the ' -e' command-line option that grep provides. For example, suppose you want to search for words "how", "to", and "forge" in all the text files present in your current working directory, then here's how you can do this:.
The ' -e' command-line option also helps in scenarios wherein the pattern begins with a hyphen -. For example, if you want to search for, say, "-how", then the following command won't be helpful:. It's when you use the -e command-line option, the command understands what exactly you are trying to search in this case:.
In case you want to limit the grep output to a particular number of lines, you can do that using the ' -m' command-line option. For example, suppose you want to search for the word "how" in testfile1.
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