Changing File Permissions

[Sanjay Verma]

Hi Friends,
I would like to change the file permissions for several files under a specific directory and it's sub / sub-sub directory.

Will appreciate if you can let me know the best way to do this.

[Karthik S S · Accepted solution]

Hi,

chmod -R nnnn /dir

ex: chmod -R 0777 /test


Regards,
karthik

[Michael Tully]

If you have a file list this can be done quite easily. e.g.

# for i in `cat filelist`
> do
> chmod 555 $i
> done

or using find

# find /mydir -name "file string" | xargs chmod 555

# find /mydir -xdev -type f -perm 666 | xargs chmod 644

It really depends on the files ...

[twang]

Change permissions of specific directory recursively:
# chmod -R 505
Change owner of specific directory recursively:
# chown -R user:group

[yogesh_4]

hi ,
# chmod -R xxx dir-name shd slove your problem . xxx indicats file permition which you want to assign.

[Sanjay Verma]

I appreciate for all your excellent and quick response. -Sanjay

[Sanjay Verma]

Michael,
I liked the command -
find /mydir -xdev -type f -perm 666 | xargs chmod 644
As I understand about xdev and xargs clearly using the man, but could you pl. explain this in your term?

[V. Nyga]

Hi Sanjay,

one more tip (you can refer it with 'man chmod'):
-R is recursively for directories and files, so you have to include the x-option (execute) for the dirs.
If you don't want this you can use:
chmod -R g+w /dir
So the permission of group is changed (w is added) for /dis, all sub-dirs and files.
Equal: u for owner, o for world/others
and '-' for permission is deleted.

Regards
Volkmar

[Vitaly Karasik_1]

by using "xdev" you tell to "find" to stay in current filesystem - usually you use it when you start your search from "/" and don't want to find in your "/var" partition.

Vitaly