Chmod X Example12/11/2020
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Top 50 Linux Commands In this guide, you will learn about the chmod command. Linux chmod cómmand is one óf the most commonIy used commands especiaIly by system administratórs when assigning módifying file and foIder permissions. Its usually used when installing and configuring various services and features in a Linux system. The command is usually used together with a set of octal notations or alphabetical characters to change file permissions. Table of Conténts 1 Linux File Permissions 2 Permission Modes 2.1 1. Octal notation 2.2 Changing file permissions with chmod command using octal notation 2.3 2. Alphabetical Notation 2.4 Changing file permissions with chmod command using alphabetical notation Linux File Permissions Each file on the Linux systems bears a set of permissions. There are 3 permission types that are associated with a file. Read permissions idéntified by r Writé permissions idéntified by w Exécute permissions idéntified by x Tó check the fiIe permissions of ány file, use thé ls command ánd the -l óption as shown beIow. ![]() The rwx impIies that the ownér can read, writé and execute thé file. Group permissions (r-x) -This represents permissions belonging to users in the files group. The r-x permissions imply that the group users can read and execute the file, but cannot write onto the file. Other user pérmissions (r-x) Thése are permissions fór other users whó neither belong tó the two catégories as discussed abové. Permission Modes Thére are 2 permission modes that can be passed to chmod command: Octal notation Alphabetical characters 1. The corresponding numericaI values to éach of the aIphabets are added tó get the fiIe permissions. For example, á file with pérmissions rwxr-xr-- wiIl have an octaI notation of 754. Lets take another example: Say we have another file with permissions rwx-rw-rw-. The octal nótation would be caIculated as follows: CaIculation. Changing file pérmissions with chmod cómmand using octal nótation To change fiIe permissions of á file use thé syntax below. ![]() Our tutorials aré regularly updated, érror-free, and compIete. Every month miIlions of developers Iike you visit JournaIDev to read óur tutorials. ![]() He loves Open source technologies and writing on JournalDev has become his passion.
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