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# Linux rgrep Command [ Linux Command Manual](#) The Linux `rgrep` command is used to recursively search for strings matching a pattern in files. The `rgrep` command functions similarly to the `grep` command. It can find files whose content contains a specified pattern. If a file's content matches the specified pattern, `rgrep` will, by default, display the line containing the pattern. ### Syntax `rgrep [-?BcDFhHilnNrv][file or directory...]` **Parameter Description**: * `-?` Display help information about the pattern and examples. * `-B` Ignore binary data. * `-c` Count the number of lines matching the pattern. * `-D` Debug mode, only lists the directories the command searches, without reading file contents. * `-F` When encountering a symbolic link, `rgrep` ignores it by default. With this parameter, `rgrep` will read the content of the original file pointed to by the link. * `-h` Specifically highlight the strings matching the pattern. * `-H` Only list the strings matching the pattern, rather than displaying the entire line content. * `-i` Ignore case distinctions. * `-l` List the names of files whose content matches the specified pattern. * `-n` Before displaying the line matching the pattern, mark the line number of that line. * `-N` Do not process recursively. * `-r` Process recursively, handling all files and subdirectories under the specified directory. * `-R` This parameter works similarly to specifying the `-r` parameter, but only processes files whose names match the pattern. * `-v` Invert match. * `-W` Limit the column where the matching string must have a certain number of characters. * `-x` Only process files with the specified extension in their names. * `--help` Online help. * `--version` Display version information. ### Example To find files in the current directory containing the string "Hello" in their sentences, you can use the following command: `rgrep Hello *` The search results are as follows: `$ rgrep Hello * #Find files in the current directory containing the string "Hello" in their sentences testfile_1:Hello 95 #The sentence containing "Hello" in testfile_1 testfile_2:Hello 2005 #The sentence containing "Hello" in testfile_2` [ Linux Command Manual](#)