¿Cuál es mejor grep o awk?

Which is better grep or awk?

Grep is a simple tool to use to quickly search for matching patterns but awk is more of a programming language which processes a file and produces an output depending on the input values. Sed command is mostly useful for modifying files. It searches for matching patterns and replaces them and outputs the result.

When only searching for strings, and speed matters, you should almost always use grep . It’s orders of magnitude faster than awk when it comes to just gross searching.

“grep vs awk” does not mean comparison between awk and grep because there is no comparison to awk whatsoever from grep. awk is a highly powerful programming language whereas grep is just a filtration tool. However, many of the things which is done using grep and few more commands can be done using a simple awk command.

Using grep and awk together

1. Find all lines in A. txt whose 3rd column has a number that appears any where in the 3rd column of B. txt.
2. Assume that I have many files like A. txt in a directory. I need to run this for every file in that directory.

Awk is a scripting language used for manipulating data and generating reports. Awk is mostly used for pattern scanning and processing. It searches one or more files to see if they contain lines that matches with the specified patterns and then performs the associated actions.

AWK was created at Bell Labs in the 1970s, and its name is derived from the surnames of its authors: Alfred Aho, Peter Weinberger, and Brian Kernighan.

Fgrep is a variant of grep that searches for fixed strings, and searching for fixed strings is faster than running a regular expression search.

Generally I would say grep is the fastest one, sed is the slowest. Of course this depends on what are you doing exactly. I find awk much faster than sed . You can speed up grep if you don’t need real regular expressions but only simple fixed strings (option -F).

fgrep Command Fgrep or the Fixed grep or grep -F is yet another version of grep which is fast in searching when it comes to search for the entire string instead of regular expression as it doesn’t recognize the regular expressions, neither any meta-characters.

AWK command in Unix/Linux with examples. Awk is a scripting language used for manipulating data and generating reports. The awk command programming language requires no compiling, and allows the user to use variables, numeric functions, string functions, and logical operators.

Difference Between sed and awk Definition. The sed is a command line utility that parses and transforms text, using a simple, compact programming language. Functionality. Both sed and awk allow processing streams of characters for tasks such as text transformation. Complexity. The sed is simple and limited while awk is more complex and versatile. Conclusion.

AWK is a domain-specific language designed for text processing and typically used as a data extraction and reporting tool. Like sed and grep, it’s a filter , and is a standard feature of most Unix-like operating systems. The AWK language is a data-driven scripting language consisting of a set of actions to be taken against streams of textual data – either run directly on files or used as part of a pipeline – for purposes of extracting or transforming text, such as producing formatted

The main difference between grep and find command in UNIX is that the grep is a command that helps to search content and display them according to the user-specified regular expression while the find command helps to search and locate files according to the given criteria.

Search for the given string in a file