![]() For example, the following command will only search for text in Java files: You can also use options like -exclude, -include, -exclude-dir, and -include-dir for more efficient and fast searching. Will search for exact "-Xms" text in all files, it is could to find the scripts where you are specifying your JVM arguments. If you also want to search for the entire word, instead of just matching a part of the text, then you cause add option -w, which matches the whole word like This will help you to learn more in a short time. then I suggest you first go through a basic course like Linux Command Line Basics on Udemy. The -R option will recursively search files in sub-directories starting from the current directory, and -i will search for the text you're provide ignoring the case.ītw, if you are not familiar with basic Linux commands like grep, find, chmod, etc. I frequently use the recursive grep command to search all files in different sub-directories for finding a reference to a specific text like any host or URL which is going to decommission and needs to be migrated: You can combine the recursive option with the ignore case option (-i) to find a specific text like hostname by ignoring the case in your config files and scripts. The grep command allows you to scan files to find any matching text and you can use the recursive option of grep command to find all files containing a reference to your old database hostnames, or a specific text in general. Anyway, how do you find all those files containing hostname in your Linux machine? Well, the grep command is here to help you. Well, you should always use an alias to connect to the database or any other system, but sometimes it happens you have to use a hostname. Now, you want to file all config files and scripts which are referencing your old database using the hostname or IP address, so that you can replace them with an alias. If you found this post interesting, I’ve also written up some examples of how to grep using Windows Powershell here.Hello guys, one of the most common tasks while working on programming projects is finding files containing some specific text like you have your application deployed in the Linux server, and you are migrating your database from one server to another. ![]() type f -exec grep -n "text_to_find" \ -print If you have filenames with spaces in them, the commands above will not work properly, another alternative is:įind. type f -print | xargs file | grep -i text | cut -d ':' -f 1 | xargs grep text_to_find If you don’t know what file type to narrow the search by, you make use of the “ file” command to restrict the search to text files only:įind. name '*.c' | xargs grep -n "text_to_find" You can narrow down the selection criteria:įind. The above command is fine if you don’t have many files to search though, but it will search all files types, including binaries, so may be very slow. If you do not have GNU grep on your Unix system, you can still grep recursively, by combining the find command with grep: But older releases of Unix do not have GNU grep and do not have any option to grep recursively. This is all very easy because Linux includes GNU grep.
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