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Full Discussion: Perl one liner to replace text
Top Forums UNIX for Dummies Questions & Answers Perl one liner to replace text Post 302663167 by analyst on Wednesday 27th of June 2012 04:36:30 PM
Old 06-27-2012
Thanks for replying Jim, prompted by your explanation, I found that the file under consideration is owned by root. A 'user' owned files can be changed by the same command.

I tried
Code:
sudo chown user 1

no error, but owner is still root. This is very irritating I have 100s of such files to work with.

---------- Post updated at 04:36 PM ---------- Previous update was at 04:04 PM ----------

Thanks I got it sorted, problem was ownership on a mounted directory.
 

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LEARN ABOUT REDHAT

logindevperm

logindevperm(4)                                                    File Formats                                                    logindevperm(4)

NAME

       logindevperm, fbtab - login-based device permissions

SYNOPSIS

       /etc/logindevperm

DESCRIPTION

       The  /etc/logindevperm  file  contains  information  that is used by login(1) and ttymon(1M) to change the owner, group, and permissions of
       devices upon logging into or out of a console device. By default, this file contains lines for the keyboard, mouse, audio, and frame buffer
       devices.

       The owner of the devices listed in /etc/logindevperm is set to the owner of the console by login(1). The group of the devices is set to the
       owner's group specified in /etc/passwd. The permissions are set as specified in /etc/logindevperm.

       Fields are separated by TAB and/or SPACE characters. Blank lines and comments can appear anywhere in the file; comments start with a  hash-
       mark, ` # ', and continue to the end of the line.

       The first field specifies the name of a console device (for example, /dev/console). The second field specifies the permissions to which the
       devices in the device_list field (third field) will be set.  These permissions must be expressed in octal format.  For  example,  O774.   A
       device_list  is  a  colon-separated list of device names.  Note that a device name must be a /dev link.  A device entry that is a directory
       name and ends with "/*" specifies all entries in the directory (except "." and ".."). For example, "/dev/fbs/*" specifies all frame  buffer
       devices.

       Once the devices are owned by the user, their permissions and ownership can be changed using chmod(1) and chown(1), as with any other user-
       owned file.

       Upon logout the owner and group of these devices will be reset by ttymon(1M) to owner root and root's group  as  specified  in  /etc/passwd
       (typically other). The permissions are set as specified in the /etc/logindevperm file.

FILES

       /etc/passwd     File that contains user group information.

SEE ALSO

       chmod(1), chown(1), login(1), ttymon(1M), passwd(4)

NOTES

       /etc/logindevperm provides a superset of the functionality provided by /etc/fbtab in SunOS 4.x releases.

SunOS 5.10                                                          22 Oct 2003                                                    logindevperm(4)
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