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  1. How-To Geek
    https://www.howtogeek.com/812961/umask-linux

    What Is umask in Linux, and How Do You Use It?

    • All directories and files have flags called mode bits that decide whether they can be read, written to, or executed. Executing a file means running it like a program or a script. For a directory, you must be able to "… See more

    The Mode Bits

    You can see the permissions for files by using the lscommand and the (long format) option. We'll also look at a directory by adding the -d (directory) option. Without this option, lsw… See more

    How-To Geek
    The Default Permissions and umask

    The default permissions for a directory are 777, and the default permissions for a file are 666. That gives every user full access to all directories, and the ability to read and write any fil… See more

    How-To Geek
    The umask Value

    The umask value is set globally with one value for root and a different one for all other users. But it can be set to a new value for anyone. To see what the current umask setti… See more

    How-To Geek
    How umask Masks Out Permissions

    Subtracting the mask value from the default permissions gives you the actual permissions. In other words, if a permission is set in the umask value it will not be set in the permiss… See more

    How-To Geek
    How do I use umask?
    You simply combine the u, g, and o values with the corresponding r, w, x permissions that you want the mask to allow. For example, to allow read, write, and execute for the file's user, read and write for the group, and read for everyone else, use umask u=rwx,g=rw,o=r.
    cbtnuggets.com
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    Table of Contents
    The Mode Bits
    The Default Permissions and umask
    The umask Value
    How umask Masks Out Permissions
    How do I use umask?
     

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  2. To use umask, you can use the following commands12:
    • To show the current umask in octal format, type umask with no switches or options.
    • To see the umask symbolically, add the -S switch to umask.
    • To change the current umask using octal values, use the command umask [mask].
    • To change the current umask using symbolic values, use the command umask -S [symbolic value].
    umask is used by open (2), mkdir (2), and other system calls that create files to modify the permissions placed on newly created files or directories3.
    Learn more:
    The umask command uses the following syntax: umask [-p] [-S] [mask] Where: [mask]: The new permissions mask you are applying. By default, the mask is presented as a numeric (octal) value. [-S]: Displays the current mask as a symbolic value.

    What is Umask and How to Use It - pho…

    phoenixnap.com/kb/what-is-umask

    Umask Commands at a Glance

    • Show the current umask in octal format To show the current umask in octal format, simply type umask with no switches or options. cooluser@LAPTOP-5V55HON5:~$ umask 0022 ...

    Umask File Permissions: A Crash Cours…

    www.cbtnuggets.com/blog/technology/system-admi…
    umask () sets the calling process's file mode creation mask (umask) to mask & 0777 (i.e., only the file permission bits of mask are used), and returns the previous value of the mask. The umask is used by open (2), mkdir (2), and other system calls that create files to modify the permissions placed on newly created files or directories.

    umask(2) - Linux manual page

    www.man7.org/linux/man-pages/man2/umask.2.html
     
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  4. GeeksForGeeks
    https://www.geeksforgeeks.org/umask-command-in...

    Umask command in Linux with examples - GeeksforGeeks

     
  5. nixCraft
    https://www.cyberciti.biz/tips/understan…

    What is Umask and How To Setup Default umask …

    May 11, 2024 · The user file-creation mode mask (umask) is used to determine the file permission for newly created files. It can be used to control the default file permission for new files. It is a four-digit octal number. A umask can be set or …

  6. phoenixNAP
    https://phoenixnap.com/kb/what-is-um…

    What is Umask and How to Use It {Update Default …

    Dec 30, 2020 · When creating a new file or directory, Linux applies the default set of permissions. The umask command lets you change these default permissions. In this tutorial, you will learn what umask is, how it works, and how to use it to …

  7. Linuxize
    https://linuxize.com/post/umask-comm…

    Umask Command in Linux | Linuxize

    Feb 23, 2021 · The umask utility allows you to view or to set the file mode creation mask, which determines the permissions bits for newly created files or directories. It is used by mkdir, touch, tee , and other commands that create new files and …

  8. Ask Ubuntu
    https://askubuntu.com/questions/44542

    What is "umask" and how does it work? - Ask Ubuntu

    How to change the default permissions of files created by ...
    transmission - File permission management
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  9. CBT Nuggets
    https://www.cbtnuggets.com/blog/tech…

    Umask File Permissions: A Crash Course - CBT Nuggets

    Jan 18, 2021 · More specifically, umask is the command that sets and displays the file mode creation mask on *nix systems. The file mode creation mask defines the default file permissions when a user creates a file. Often the term umask is …

  10. Baeldung
    https://www.baeldung.com/linux/umask

    What Is a umask and How to Set It System-Wide?

    Mar 26, 2024 · In this tutorial, we take a deep dive into umask and explore how to set a system-wide umask. First, we go over the way Linux handles default file permissions. Next, we extrapolate the usual base permissions set. After that, …

  11. DigitalOcean
    https://www.digitalocean.com/community/tutorials/...

    Linux Permissions Basics and How to Use Umask on a VPS

  12. LinuxOPsys
    https://linuxopsys.com/linux-umask-co…

    Linux umask Command Explained - LinuxOPsys

    Nov 7, 2023 · Syntax. The basic syntax of the umask command: umask [-p] [-S] [mask] Options. You can use the following options with umask: None : Set the umask value (when accompanied by an octal). None : Display the current …

  13. Liquid Web
    https://www.liquidweb.com/blog/what-i…

    What Is Umask? How to Use it Effectively - Liquid Web

    Jan 25, 2023 · Umask (short for user file-creation mode mask) is used by UNIX-based systems to set default permissions for newly created files and directories. It does this by masking or subtracting these permissions.

  14. linuxnix.com
    https://www.linuxnix.com/umask-define-linuxunix

    What is UMASK and how to set UMASK in Linux/Unix?

  15. IOFLOOD
    https://ioflood.com/blog/umask-linux-command

    Linux ‘umask’ Command: Default Permissions Guide

  16. commandinline.com
    https://www.commandinline.com/cheat-sheet/umask

    umask Cheat Sheet | umask Command Line Guide

  17. HowtoForge
    https://www.howtoforge.com/linux-umask

    What is umask in Linux? - HowtoForge

  18. Medium
    https://medium.com/it-security-in-plain-english/...

    Understanding Linux Permissions: A Guide to umask, chmod, …

  19. Linuxaria
    https://linuxaria.com/article/linux-shell...

    Linux shell: understanding Umask with examples - Linuxaria

  20. linuxzoo
    https://linuxzoo.net/page/sec_umask.html

    Controlling file permissions with umask - linuxzoo

  21. Medium
    https://medium.com/@zomev/what-is-umask-and-how-to...

    What is Umask and How to Use It on a VPS? | by ZOMEV - Medium

  22. YouTube
    https://www.youtube.com/watch?v=ZfDbUxH99n0

    what is umask? (intermediate) anthony explains #346 - YouTube

  23. Hostinger
    https://www.hostinger.com/tutorials/how-to-change...

    How to Change File Permissions and Ownership in Linux