How to assign permissions to a folder and its subfiles using chmod command in Linux system

In Linux systems, we can use the chmod command to authorize the folder and its subfiles. The chmod command is used to modify the access permissions of files or directories. First, we need to open the terminal and switch to the directory where the folder to be authorized is located. After taking out the linux port mapping, you can use the following methods to grant specific permissions to the folder and its sub-files: 1. Use numerical form to grant permissions: a. Use the chmod command linux to authorize the folder to the user, as shown above Follow the permission numbers. The permission number is a three-digit number, each digit represents a permission (read, write, execute), corresponding to 4, 2, and 1 respectively. b. For example, in the Linux command manual, to set the permissions of a folder and its sub-files to read, write and execute permissions, you can use the command "chmod-R700folder". Among them, the -R parameter indicates a recursive operation, and 700 indicates that the user (owner) has read, write, and execute permissions, and other users do not have any permissions. 2. Use symbolic form to assign permissions: a. Use the chmod command, preceded by the permissions represented by the symbol. Notations include u (user/owner), g (user group), o (other users/other groups), and a (all users). b. Use , - and = to reduce, reduce or set permissions. For example, "rwx" means to reduce read, write and execute permissions; "-w" means to reduce write permissions; "=" means to set specific permissions. c. For example, if you want to set the permissions of a folder and its sub-files to have read, write, and execute permissions for users, but not have any permissions for user groups and other userslinux authorizes folders to users, you can use Command "chmod-Ru=rwx,go=folder". Through the above method, we can flexibly authorize folders and their sub-files to ensure security and permission management.

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