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Hadoop-2.6.5/etc/hadoop/hadoop-policy.xml: The ACL is a comma-separated list of user and group names. Hadoop-2.6.5/etc/hadoop/core-site.xml:&tl ?xml-stylesheet type="text/xsl" href="configuration.xsl"?> Hadoop-2.6.5/etc/hadoop/capacity-scheduler.xml:
LINUX SEARCH FOR TEXT IN FILES AND SUBDIRECTORIES CODE
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. head: Output the first part of files.-n: Print the first ‘n’ lines. sort command : Sort lines of text files.-n: Compare according to string numerical value.-r: Reverse the result of comparisons. With this option one can search the current directory and and all levels of subdirectories by passing the -r or -R to the grep command. Hadoop-2.6.5/sbin/hadoop-daemon.sh:done Using egrep –r 'word1|word2' Let us break down the command and see what says each parameter. Pass the -r option to grep command to search recursively through an entire directory tree. 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 Its basic structure is just grep string filename. Hadoop-2.6.5/sbin/distribute-exclude.sh:done The grep command is an intuitive and easy-to-use tool for string searching. For example, the following would search all files in the current directory and in all of its subdirectories including their subdirectories. You need to use the following syntax: The -r option is used to search recursively through an entire directory tree. Running the above code gives us the following result − hadoop-2.6.5/sbin/slaves.sh:done The grep command is used to search text for patterns (words) specified on the command line. In this case we mention the r switch, which allows for a recursive search along all the subdirectories of the path given. Hadoop-2.6.5/etc/hadoop/yarn-site.xml: Using grep -r Hadoop-2.6.5/etc/hadoop/hadoop-policy.xml:
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You can also use space to separate several directories and files: ls /etc /var /etc/passwd.
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To list the contents of the /etc directory, for example, type: ls /etc. grep example document.txt Searching a file for a text string with grep As you can see from the screenshot, grep returns the entire line that contains the word example. Running the above code gives us the following result − hadoop-2.6.5/etc/hadoop/capacity-scheduler.xml: To list files in a single directory, use the ls command with the directory path as an input. To search a file for a text string, use the following command syntax: grep string filename For example, let’s search our document.txt text document for the string example. 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. The -size flag allows you to search for files that take up a particular amount of space on the disk.Many times we need to search for a particular string which may be present in multiple files. To search for sub-directories present in the /home directory: find /home - type d Find Files by Size To search for other file types in Linux, replace f with other reserved characters. Till now, we have been using the -type f option in the find command. Directories, symbolic links, sockets, and character devices are some of the file types that are supported by find. In addition to files, the find command can search for other type of files as well.