How do you grep for two strings?

How do you grep for 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 I grep a string?

The grep command can search for a string in groups of files. When it finds a pattern that matches in more than one file, it prints the name of the file, followed by a colon, then the line matching the pattern.

How do I grep a string file?

To search multiple files with the grep command, insert the filenames you want to search, separated with a space character. The terminal prints the name of every file that contains the matching lines, and the actual lines that include the required string of characters. You can append as many filenames as needed.

What can I use instead of grep?

The findstr command is a Windows grep equivalent in a Windows command-line prompt (CMD). In a Windows PowerShell the alternative for grep is the Select-String command.

How do you grep on a Mac?

GNU Grep on Mac GNU grep can be installed on the Mac by means of homebrew. After brew has installed grep, you have two versions of the command. The BSD version is called grep and the GNU version is called ggrep . The examples that follow use the GNU version of grep, so Mac users should use the ggrep command.

How do I grep a string in Windows?

Grep for Windows – findstr example

1. Filter a result. 1.1 Classic example to filter a listing result. #Linux $ ls -ls | grep mkyong #Windows c:\> dir | findstr mkyong.
2. Search a File. 2.1 Search matched string in a file.
3. Search a list of files. 3.1 Search matched string in a list of files.
4. Help. 4.1 The most powerful command ~

Can you use grep on Windows?

Grep is a command-line option used to find a specific string from inside a file or multiple files or from an output of a command but it can be used only in Linux. For Windows, the grep alternative is findstr.

Is there a difference between egrep and Fgrep Yea Nay?

The grep filter searches a file for a particular pattern of characters and displays all lines that contain that pattern. The fgrep filter searches for fixed-character strings in a file or files. The main difference between both commands is: String matching algorithm used by them.

What’s difference between grep, egrep and fgrep in Linux?

egrep and fgrep are deprecated commands and should be avoided.

egrep is equivalent to grep -E command and it allows the use of extended regex.

fgrep is equivalent to grep -F command and it uses a fixed string for search and hence it performs a faster search.

How to use grep?

The Story Behind grep. The grep command is famous in Linux and Unix circles for three reasons.

Simple Searches With grep. Matching lines are displayed.

Recursive Searches With grep.

Searching for Whole Words.

Using Multiple Search Terms.

Matching Lines Exactly.

Only Displaying Matching Text.

Counting With grep.

Adding Context.

Showing Matching Files.

How does grep got its name?

Its name comes from another similar command in ed tool, i.e., g/re/p which stands for g lobally search for a re gular expression and p rint matching lines. grep basically searches for a given pattern or regular expression from standard input or file and prints the lines that match the given criteria.

What is Linux grep command?

The Linux grep command is used as a method for filtering input. GREP stands for Global Regular Expression Printer and therefore in order to use it effectively, you should have some knowledge about regular expressions.