If you have any questions or thoughts to share, use the feedback form below to reach us. In this article, we shared some useful file command examples. That’s all! file command is a useful Linux utility to determine the type of a file without an extension. $ file -extension /dev/sdaįor more information and usage options, consult the file command man page. In addition, you can get a slash-separated list of valid extensions for the file type found by adding the –extension switch. dev/sda: application/octet-stream charset=binaryĨ. You can tell file command to output mime type strings instead of the more traditional human readable ones, using the -i option. If you want to report information about the contents only not the compression, of a compressed file, use the -Z flag. To find any Linux file with an extension, find, locate, and grep commands are used, which search the files from the given path. Adding the -z options instructs file to look inside compressed files. dev/sda: DOS/MBR boot sector, extended partition table (last)ĥ. The -s option causes file to also read block or character special files, for example. To make file work faster you can exclude a test (valid tests include apptype, ascii, encoding, tokens, cdf, compress, elf, soft and tar) from the list of tests made to determine the file type, use the -e flag as shown. You can also pass the names of the files to be examined from a file (one per line), which you can specify using the -f flag as shown. The simplest file command is as follows where you just provide a file whose type you want to find out.
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