Human readable file linux

Question What Is A Human Readable File In Linux

In short, human readable means a human can read it and does not require computer translation. In more complex terms human readable content will be in ASCII or something similar while non-human readable data will be in binary.

What is a human readable file?

A human-readable medium or human-readable format is any encoding of data or information that can be naturally read by humans. This has led to humane markup languages and modern configuration file formats that are far easier for humans to read.

How do I access human readable files in Linux?

To filter out the human-readable file names, you can make use of the [:print:] (printable) character class name. You will find more about such classes in the manual for grep .

How do I determine the size of a human readable file?

Human readable output ls command displays file size in number of bytes by default. To get a more human readable output, -h option can be used, which translates bytes into KB, MB, GB and etc.

How do I list files in Linux?

The easiest way to list files by name is simply to list them using the ls command. Listing files by name (alphanumeric order) is, after all, the default. You can choose the ls (no details) or ls -l (lots of details) to determine your view.

How do I find on Linux?

Basic Examples find . – name thisfile.txt. If you need to know how to find a file in Linux called thisfile. find /home -name *.jpg. Look for all . jpg files in the /home and directories below it. find . – type f -empty. Look for an empty file inside the current directory. find /home -user randomperson-mtime 6 -iname “.db”.

Is machine code human-readable?

However, assembly is the way that machine code is displayed in human-readable format. Since all programs at some point become machine code, that means when a programmer is debugging a program at a low level, they will often be looking at assembly.

What is an example of human-readable data?

An example of a human-readable format is a PDF document. Although PDF is a digital media, its data representation does not require any specialized equipment or computer to interpret. Moreover, the information contained in the PDF document is usually intended toward humans, not machines.

What is an example of human-readable output?

Human readable: suitable for communicating with computer user. For example – video display terminals and printers. Machine readable: suitable for communicating with equipment. For example – sensor, actuators used in robotics application.

What is File command in Linux?

file command is used to determine the type of a file. .file type may be of human-readable(e.g. ‘ASCII text’) or MIME type(e.g. ‘text/plain; charset=us-ascii’). This command tests each argument in an attempt to categorize it. The program verifies that if the file is empty, or if it’s some sort of special file.

What is DU in Linux command?

The du command is a standard Linux/Unix command that allows a user to gain disk usage information quickly. It is best applied to specific directories and allows many variations for customizing the output to meet your needs.

What does find command do in Linux?

The find command in UNIX is a command line utility for walking a file hierarchy. It can be used to find files and directories and perform subsequent operations on them. It supports searching by file, folder, name, creation date, modification date, owner and permissions.

How do I know what size ls to get?

Using the ls Command –l – displays a list of files and directories in long format and shows the sizes in bytes. –h – scales file sizes and directory sizes into KB, MB, GB, or TB when the file or directory size is larger than 1024 bytes. –s – displays a list of the files and directories and shows the sizes in blocks.

What is the output of ls?

The default output of the ls command shows only the names of the files and directories, which is not very informative. The -l ( lowercase L) option tells ls to print files in a long listing format. When the long listing format is used, you can see the following file information: The file type.

How do I see file size in Linux?

Use ls command for files and du command for directories. ls command will not list the actual size of directories(why?). Therefore, we use du for this purpose. Including -h option in any of the above commands (for Ex: ls -lh * or du -sh ) will give you size in human readable format ( kb , mb , gb , )Jul 30, 2012.

How do I list all directories in Linux?

The ls command is used to list files or directories in Linux and other Unix-based operating systems. Just like you navigate in your File explorer or Finder with a GUI, the ls command allows you to list all files or directories in the current directory by default, and further interact with them via the command line.

How do I get a list of directories in Linux?

Use the ls command to display the contents of a directory. The ls command writes to standard output the contents of each specified Directory or the name of each specified File, along with any other information you ask for with the flags.

How do I list subfolders in Linux?

Try any one of the following command: ls -R : Use the ls command to get recursive directory listing on Linux. find /dir/ -print : Run the find command to see recursive directory listing in Linux. du -a . : Execute the du command to view recursive directory listing on Unix.

How do I find a filename in Linux?

Finding files by name is probably the most common use of the find command. To find a file by its name, use the -name option followed by the name of the file you are searching for. The command above will match “Document. pdf”, “DOCUMENT.

What is a shell in Linux?

The shell is the Linux command line interpreter. It provides an interface between the user and the kernel and executes programs called commands. For example, if a user enters ls then the shell executes the ls command.

How do I find the terminal in Linux?

How to Find Files in Linux Terminal Open your favorite terminal app. Type the following command: find /path/to/folder/ -iname *file_name_portion* If you need to find only files or only folders, add the option -type f for files or -type d for directories.

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Finding human-readable files on Unix

I’d like to find human-readable files on my Linux machine without a file extension constraint. Those files should be of human sensing files like text, configuration, HTML, source-code etc. files. Is there a way to filter and locate?

The file utility is pretty good at determining the type of content in a file. Perhaps you could use this and filter files based on its output.

AFAIK only Windows trusts file extension. UNIX-like OSs use file . Anyway, you have to define «human readable».

How precisely does this need to be? And are you looking for EVERY file in the system, or just in a selected part of the system? What if the system has umpteen terabytes of disks attached, is it acceptable to wait for several hours (because that’s how long it takes to actually read all the files)?

Also, would for example a PDF be considered human readable, or not? What about «postscript»? What about contents in a mail-folder? What about .zip, .tar, .gz, .bz, or .xz files? If those are just containers for text files, does that count?

i will be searching in a directory with size of, let us a say, 5 GB. to define human-readable on examples; pdf, tar.gz, an thunderbird mail file, open office files etc are not-readable. we should read files by more utility or vi.

3 Answers 3

find /dir/to/search -type f | xargs file | grep text

find will give you a list of files.

xargs file will run the file command on each of the lines from the piped input.

And for files with funny names: find /dir/to/search -type f -print0 | xargs -0 file | grep text . funny? Embedded spaces, parenthesis, brackets, braces, .

find /dir/to/search -type f -exec sh -c 'file -b <> | grep text &>/dev/null' \; -print 

This will find any files (NOTE: it will not find symlinks directories sockets, etc., only regular files) in /dir/to/search and run sh -c ‘file -b <> | grep text &>/dev/null’ ; which looks at the type of file and looks for text in the description. If this returns true (i.e., text is in the line) then it prints the filename.

NOTE: using the -b flag to file means that the filename is not printed and therefore cannot create any issues with the grep. E.g., without the -b flag the binary file gettext would erroneously be detected as a textfile.

root@osdevel-pete# find /bin -exec sh -c 'file -b <> | grep text &>/dev/null' \; -print /bin/gunzip /bin/svnshell.sh /bin/unicode_stop /bin/unicode_start /bin/zcat /bin/redhat_lsb_init root@osdevel-pete# find /bin -type f -name *text* /bin/gettext 

If you want to look in compressed files use the —uncompress flag to file. For more information and flags to file see man file.

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