It is much easier to use directory permissions and, if necessary, ACLs for this. If more than one user needs access, create a group, use chgrp to assign the group ownership of the directory to that group, set permissions to chmod or If there are any existing sub-directories, do the same for them too. Then add the required users to that group.
Overview On Linux and other Unix -like operating systemsthere is a set of rules for each file which defines who can access that file, and how they can access it. These rules are called file permissions or file modes.
The command name chmod stands for "change mode", and it is used to define the way a file can be accessed. It contains a comprehensive description of how to define and express file permissions. In general, chmod commands take the form: There are two ways to represent these permissions: Let's say you are the owner of a file named myfile, and you want to set its permissions so that: This command will do the trick: The letters u, g, and o stand for "user", "group", and "other".
The commas separate the different classes of permissions, and there are no spaces in between them. Here is the equivalent command using octal permissions notation: Each digit is a combination of the numbers 4, 2, 1, and 0: Options Like --verbose, but gives verbose output only when a change is actually made.
Technical Description chmod changes the file mode of each specified FILE according to MODE, which can be either a symbolic representation of changes to make, or an octal number representing the bit pattern for the new mode bits. The format of a symbolic mode is: Multiple symbolic modes can be given, separated by commas.
A combination of the letters u, g, o, and a controls which users' access to the file will be changed: If none of these are given, the effect is as if a were given, but bits that are set in the umask are not affected.
The letters r, w, x, X, s and t select file mode bits for the affected users: For directories, the execute options X and X define permission to view the directory's contents. Instead of one or more of these letters, you can specify exactly one of the letters u, g, or o: A numeric mode is from one to four octal digitsderived by adding up the bits with values 4, 2, and 1.
Omitted digits are assumed to be leading zeros. The first digit selects the set user ID 4 and set group ID 2 and restricted deletion or sticky 1 attributes.
The second digit selects permissions for the user who owns the read 4write 2and execute 1 ; the third selects permissions for other users in the file's group, with the same values; and the fourth for other users not in the file's group, with the same values.
However, this is not a problem since the permissions of symbolic links are never used. However, for each symbolic link listed on the command linechmod changes the permissions of the pointed-to file. In contrast, chmod ignores symbolic links encountered during recursive directory traversals.
Setuid And Setgid Bits chmod clears the set-group-ID bit of a regular file if the file's group ID does not match the user's effective group ID or one of the user's supplementary group IDs, unless the user has appropriate privileges.
This behavior depends on the policy and functionality of the underlying chmod system call. When in doubt, check the underlying system behavior.
Restricted Deletion Flag or "Sticky Bit" The restricted deletion flag or sticky bit is a single bit, whose interpretation depends on the file type.
For regular files on some older systems, the bit saves the program's text image on the swap device so it will load more quickly when run; this is called the sticky bit. Viewing Permissions of files A quick and easy way to list a file's permissions are with the long listing -l option of the ls command.
For example, to view the permissions of file. In this case, any member of the file's owning group may read from or write to the file. The final dash is a placeholder; group members do not have permission to execute this file.
Others may only read this file.granting write permissions to a group to a folder. Ask Question. I want to grant read write access to both alex and ben on the folder consult_documents.
Thank you, I was looking how to give access to a directory to one group. I did not realize that the chgrp command could do this. Every file in Unix is assigned a mode.
The mode determines the type of file being viewed, the access allowed to the file by different groups, and a few other things. The command to modify the mode is chmod and users can only modify files they own. The first thing mode determines is the type of file.
Linux Permissions Guide Permissions on Plex Media Server This is a write up of how permissions on Linux systems affect Plex Media Server and how it affects its ability to find you media. In the same way, you can also give a file write permission, like this: chmod +w initiativeblog.com This example makes the same assumptions as the previous command, you either own the file, or .
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granting write permissions to a group to a folder. Ask Question. ben is member of group ben and of group consult. I want to grant read write access to both alex and ben on the folder consult_documents.
I'm running a server, and I need to give read/write access to a particular directory to a single user. I've tried the following: sudo adduser abcd sudo groupadd abcdefg chown initiativeblog.comg /var/www/.