In Linux or Unix grep is a command which comes pre-installed with the system. if it is not present in your system you can install this by running the below command in your terminal.
<pre><code class="lang-plaintext">$ sudo apt-get install grep
</code></pre>
It is widely used command in day to day tasks. This command is used to search a regular expression or string in a text file. Grep stands for global regular expression print.
Syntax:
<pre><code class="lang-plaintext">$ grep "string" file name
</code></pre>
If you wish to search something across current directory and inside all the sub- directories you can use -r flag with this command to search recursively.
Syntax:
<pre><code class="lang-plaintext">$ grep -r "string-name" *
</code></pre>

In Linux or Unix *grep* is a command which comes pre-installed with the system. if it is not present in your system you can install this by running the below command in your terminal.

```plaintext
$ sudo apt-get install grep
```

It is widely used command in day to day tasks. This command is used to search a regular expression or string in a text file. *Grep* stands for global regular expression print.

Syntax:

```plaintext
$ grep "string" file name
```

If you wish to search something across current directory and inside all the sub- directories you can use -r flag with this command to search recursively.

Syntax:

```plaintext
$ grep -r "string-name" *
```

Grep Command in Linux/Unix

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