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Full Discussion: Change the group name
Top Forums Shell Programming and Scripting Change the group name Post 302401375 by methyl on Friday 5th of March 2010 08:11:40 PM
Old 03-05-2010
Fundamentals time.

We assume that you are trying to change the group of files.
If this assumption is correct.

The syntax of the command is:

Code:
chgrp newgroup filename

Where "chgrp" is the command. See "man chgrp".
Where "newgrp" is the new group name for the "filename".
Where "filename" is the name of the file.


I am stuck.
What exactly is the contents of the "file" ? We can deduce that it contains a list of unix usernames with matching new group name. But what is the exact format of "file"?


Note: The output from:
Code:
ll -la | awk '{ print $4}'

is a list of group names. Because this list does not mention the filename the xargs comand is doomed to failure.


Please post the contents of the file called "file" and state the criteria for changing the group of files.
Last edited by methyl; 03-05-2010 at 09:14 PM.. Reason: grammar
 

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LEARN ABOUT OSX

chgrp

CHGRP(1)						    BSD General Commands Manual 						  CHGRP(1)

NAME

     chgrp -- change group

SYNOPSIS

     chgrp [-fhv] [-R [-H | -L | -P]] group file ...

DESCRIPTION

     The chgrp utility sets the group ID of the file named by each file operand to the group ID specified by the group operand.

     The following options are available:

     -f      The force option ignores errors, except for usage errors and doesn't query about strange modes (unless the user does not have proper
	     permissions).

     -H      If the -R option is specified, symbolic links on the command line are followed.  (Symbolic links encountered in the tree traversal
	     are not followed).

     -h      If the file is a symbolic link, the group ID of the link itself is changed rather than the file that is pointed to.

     -L      If the -R option is specified, all symbolic links are followed.

     -P      If the -R option is specified, no symbolic links are followed.  This is the default. Use -h to change the group ID of a symbolic
	     link.

     -R      Change the group ID for the file hierarchies rooted in the files instead of just the files themselves.

     -v      Cause chgrp to be verbose, showing files as the group is modified.

     The -H, -L and -P options are ignored unless the -R option is specified.  In addition, these options override each other and the command's
     actions are determined by the last one specified.

     The group operand can be either a group name from the group database, or a numeric group ID.  If a group name is also a numeric group ID, the
     operand is used as a group name.

     The user invoking chgrp must belong to the specified group and be the owner of the file, or be the super-user.

DIAGNOSTICS

     The chgrp utility exits 0 on success, and >0 if an error occurs.

COMPATIBILITY

     In previous versions of this system, symbolic links did not have groups.

     The -v option is non-standard and its use in scripts is not recommended.

FILES

     /etc/group  group ID file

SEE ALSO

     chown(2), fts(3), group(5), passwd(5), symlink(7), chown(8)

STANDARDS

     The chgrp utility is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.

BSD
								  March 31, 1994							       BSD
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