Maybe want to give it a try, otherwise I would advise you to look at the thread "Fastest possible grep", see comment from Cyrus. The diff produces no output, which means the found results are the same. If you’ve already opened a file in a command line or GUI editor, there are search functions available there as well. The grep command proves very wieldy and can fetch results lightning quick. Now lets check if the results are the same: cat m1.out | sort | uniq > m1.sort Searching files on Linux for a text string is a common task and it’s one that’s easy to master. The third methode using -E only took 4.22 seconds to search through the file. Or grep -color=auto -e "ab" -e "cd" -e "ef" strings.txt > /dev/nullģ,86s user 0,38s system 98% cpu 4,323 total 25 basic 'find' command to search files in Linux with Examples Last updated on January 7th, 2022 - by LinuxTeck - Leave a Comment The find command in Linux/Unix is known to be one of the most important and frequently used commands for searching files and directories. Now using multiple search patterns with -e grep -E "ab|cd|ef" strings.txt > m3.outģ,80s user 0,36s system 98% cpu 4,220 total
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>grep -F -f search.txt strings.txt > m2.outģ1,55s user 0,60s system 99% cpu 32,343 totalįor some reasons this takes nearly 32 seconds. Using grep with -f flag with search strings in search.txt >cat search.txt So in total the search takes nearly 10 seconds. Using grep without flags, search one at a time:Ģ,76s user 0,42s system 96% cpu 3,313 totalĢ,82s user 0,36s system 95% cpu 3,322 totalĢ,78s user 0,36s system 94% cpu 3,360 total.Now I want to search for strings "ab", "cd" and "ef" using different grep approaches: Have 1.2GB file filled with random strings. However I wanted to show you what can be done and what might be worth testing: Note that this might not be applicable for your problem as you are searching for 50,000 string in a larger file. While creating an index takes time, it has to be done only once per folder. The first counts the lines, words and characters. wc test.txt wc -l test.txt wc -w test.txt wc -c test.txt. The command wc stands for word count but it can count much more that that. A good rule of thumb is 200 files per minute. Using the command wc we are at the heart of extracting and searching data from files at the Linux command line. The indexing process can take a while, depending on the number and sizes of the files to be indexed.
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It has a focus on providing a very small memory footprint along with with extremely fast searching. Clicking on the 'Run' button on the bottom right of this dialog starts the indexing. Applications can use the Baloo framework to provide file search results. It is not an application, but a daemon to index files. Baloo is a file indexing and searching framework for KDE Plasma. I once noticed that using -E or multiple -e parameters is faster than using -f. Baloo KDE’s file indexing and search solution.