11/6/2023 0 Comments Grep recursive sunosTo search for all the lines that does not contain the keyword root: Suppose we want to search for all lines that contain the keyword root in /etc/group file and view their line numbers, we use following option : Searches for the expression as acomplete word, ignoring those matches that are sub strings of larger words Inverts the search to display lines that do not match pattern Precedes each line with the relative line number in the file Lists the name of files with matching lines Searches both uppercase and lowercase characters Following command is used :ĭaemon 2557 1 0 Jul 07 ? 0:00 /usr/lib/nfs/statd Lets take an example where we want to see if the process statd is running of not. Using the grep command : The grep is very useful and widely used command. Searching Files, Directories & its contents : and /.Įxample: If you want to move two levels up the current working directory, we will use the command : We can also navigate multiple levels up in directory using cd. So if we want to go to the parent directory of the current working directory following command is used: → Parent directory or directory above the current working directory. There are few other path name abbreviations which we can use as well. However this functionality is not available in all shells. In the above examples, the '~' character is the abbreviation that represents the absolute path of the user's home directory. There is also a different way to navigate to the user's home directory : If cd command is used without any option it changes the directory from current working directory to user's home directory.Įxample: Let the user be 'ravi' and current working directory is /var/adm/messages If you found this post interesting, I’ve also written up some examples of how to grep using Windows Powershell here.Changing Directories : 'cd' commad is used to change directories. 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. To search within particular file types:. Note line numbers are added with -n option I always like to use grep -rn because it shows the line number also:. You could easily replace that with “/etc” for example:
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