And if you’re invoking a new shell each time to launch the command, that overhead gets worse.īut sometimes-depending on what you’re trying to achieve-you may not have another option. There’s a CPU load and time penalty for repeatedly calling a command when you could call it once and pass all the filenames to it in one go.
We can use ls to see the archive file that is created for us. The tar utility will create an archive file called “page_.”
Running the above code gives us the following result − hadoop-2.6.5/etc/hadoop/capacity-scheduler.xml: In the below example we are searching for files containing either the word config or the word comma. We can also search for multiple words by using the egrep command with | character. Hadoop-2.6.5/sbin/hadoop-daemon.sh:done Using egrep –r 'word1|word2' Hadoop-2.6.5/sbin/mr-jobhistory-daemon.sh: done
Hadoop-2.6.5/sbin/refresh-namenodes.sh: echo "Refresh of namenodes done." Hadoop-2.6.5/sbin/refresh-namenodes.sh: done Hadoop-2.6.5/sbin/distribute-exclude.sh:done Running the above code gives us the following result − hadoop-2.6.5/sbin/slaves.sh:done In this case we mention the r switch, which allows for a recursive search along all the subdirectories of the path given. The following command finds all files with the word maybe. Multiple wildcards can be used in the same find command. To find a file that starts with project: find / -name project -print. Hadoop-2.6.5/etc/hadoop/yarn-site.xml: Using grep -r The character causes the shell to ignore the following character, in this case an asterisk. Hadoop-2.6.5/etc/hadoop/hadoop-policy.xml: At a basic level, it will match an input string with the list of files that contain that string.Below is the syntax and the example. It is a powerful regular expression search tool. In this article we'll see which commands to use to find all the files that contains a particular string or Word. Many times we need to search for a particular string which may be present in multiple files.