Hosting your own web site - Enabling chmod You can set whether or not
Enabling chmod You can set whether or not a user can change the permissions associated with a file or directory using the chmod parameter. You set chmod to either yes (to allow it) or no (to disallow it). Then you can add a comma-separated list of keywords to choose who is assigned that permission. Here is an example: chmod yes guest,class=home chmod no anonymous In this example, all guest users are allowed to use the chmod command in directories to which they are allowed to upload files. An anonymous user, however, is not allowed to use the chmod command to change file and directory permissions. Enabling delete To allow users with Linux ownership permission to delete files, use the delete parameter. Here is an example: delete yes class=home delete no anonymous,guest This example enables deletions for any user in the home class. However, deletions are not allowed for anonymous or guest users who do not belong to that class. Enabling overwrite To allow users to overwrite files that currently exist on the FTP server, use the overwrite parameter. Here is an example: overwrite no anonymous,guest,class=home In this example, no anonymous users, guest users, or users from the class “home” are allowed to overwrite files using the FTP service (regardless of the ownership of the files). Enabling rename To allow a user to rename a file with the FTP service, use the rename parameter. Here is an example: rename no anonymous,guest This prevents anonymous or guest users from renaming files using the FTP service, regardless of file ownership. Enabling umask To enable a user to change the default permission bits assigned to the files and directories the user uploads, use the umask parameter. Here is an example: umask yes anonymous,guest This example enables anonymous and guest users to use umask. Limiting the number of concurrent users You can limit how many users at a time can be logged in to your FTP server based on the class of the user. This is an excellent way of making sure that your local users can access your server, even when there is extraordinary demand from the outside world. (By not defining any limit values, you ensure that connections will not be refused based on there being too many connections.) Here are some examples of limit entries:
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