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Top Forums UNIX for Advanced & Expert Users Automate setting of group permissions Post 302515123 by mregine on Tuesday 19th of April 2011 06:11:18 AM
Old 04-19-2011
Automate setting of group permissions

What would be a practical way of making sure files I upload to/edit in a particular directory on a server always have the correct group permissions?

I'm forgetful, so I try to automate things like chgrp'ing the files when I'm done. I could write a script to be run by cron. Is that the only way, or are there any options/variables I can use with ssh and scp so that files created by my user automatically have the right group and permissions?

Note: Files should belong to a certain group if they are located in a certain directory, but elsewhere on the server, they should belong to my primary group.

(The story: This is a web server on which I have my personal homepage and on which there are also areas which need to be editable by the whole department. The admins have created a group for that, www-ourdept. How do I avoid forgetting to chgrp/chown the stuff after I'm done? Apart from using a post-it as reminder on the monitor of my PC, of course.)
 

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chown(8)						      System Manager's Manual							  chown(8)

Name
       chown - change owner and, optionally, group

Syntax
       /etc/chown [ -fR ] owner[.group] file...

Description
       The  command  changes  the owner and, optionally, group for one or more files and directories.  The value for file can be a full or partial
       path.  The value for owner can be either a decimal UID or a login name found in the password file.  The value for group	can  be  either  a
       decimal GID or a group name found in the group file.

       Only  the  superuser  can change the ownership of a file.  The superuser can also change the group of a file.  The owner of a file can only
       change the group, but the owner must be a member of any group specified.

Options
       -f   Inhibits display of errors that are returned when cannot change the owner or group of the specified files.

       -R   Causes to recursively descend any directories subordinate to file and to set the owner, group, or  both  for  each	file  encountered.
	    When  symbolic  links  are encountered, changes the owner and group for the link file itself but does not traverse the path associated
	    with the link.  The option is useful only when file is a directory that is not empty.

Examples
       Change the owner of to ecbell:
       /etc/chown ecbell myfile

       Change the owner of to craig and group of to admin:
       /etc/chown craig.admin myfile

       Change the owner to richart and group to eng for the directories and and for all files and directories on any levels subordinate to and
       /etc/chown -R richart.eng projecta projectb

Files
       See Also
	      chgrp(1), chown(2), group(5), group(5yp), passwd(5), passwd(5yp)

																	  chown(8)
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