That just redirects the stderr to /dev/null. n: Display line numbers for matched content. rnw: Options for grep: -r: Recursively search subdirectories. The host name where the file is sourced from is at the beginning of second line. Hereâs a breakdown of the command: grep: The command used for pattern matching. To determine where a file is hosted this is what I do: cd /path/to/folder df -k. To ignore/remove those, do: find / -name 'filename' 2>/dev/null To find a file in Linux based on its content using grep, we can follow the syntax: grep -rnw ââ -e ââ.find / -name 'Foo.txt' 2>/dev/null /home/seth/Documents/Foo.txt 2. Use 2>/dev/null to silence permission errors (or use sudo to gain all permissions). One more thing: if you start searching from / and are not root or are not sudo running the command, you might get warnings that you don't have permission to read certain directories. Find a single file by name When you know the name of a file but can't remember where you saved it, use find to search your home directory. There are many more options to the find command and you should do a: man find Also, for example, if you're searching for java files and you know they are somewhere in your /home/username, do: find /home/username -name *.java To not differentiate between lowercase and uppercase letters we use the -iname parameter. This requires an exact file name and is case sensitive: Here we are looking for a file with the exact file name. To filter for file names, use the -name parameter. You can also use single quotes instead of double quotes, but in most cases you don't need either one, so the above commands will work without any quotes as well. Using the Linux file command to filter by file name. Will look for "filename" or all the files that match the regex expression in between the quotes, starting from the root directory. You can also explicitly specify a directory to start searching from as the first argument to find: find / -name "filename" You can also have wildcards inside the quotes, and not just a strict filename. To search for files within the current directory: find -name "filename" As you know, Linux is case sensitive about file. For example, to search for a file named report.pdf in the /home directory, you would use the following command: find /home -type f -name report.pdf. To find a file using the filename, use the -name flag with the default command. CentOS is Linux, so as in just about all other Unix/Linux systems, you have the find command. The -type f option tells the system that weâre looking for a File.
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