Changing Unix File and Directory Permissions
1. Using an SSH Client such as F-Secure, open a connection to odin. Use the same login and password you'd use on bigdog or isis.
2. Move the directory containing your new directory. Most of odin's NT shares begin in /u/loen . deimos, dwg and dwg2 live there.
[Assuming that '%' is the prompt, type as follows:]
% cd /u/loen/dwg2 % cd hires
3. Confirm your location.
% pwd
Odin should return:
/u/loen/dwg2/hires
4. List the permissions for your directory.
% ls -l HIRES-CCD <= or % ls -l |more <= shows all directories in hires
Sample output:
% drwxrwsr-x 5 loen DOS ---- 512 Sep 5 15:10 HIRES-CCD
^ <= d for directory ('-' = file; 'l' = link)
% drwxrwsr-x 5 loen DOS---- 512 Sep 5 15:10 HIRES-CCD
^^^ <= user's (aka owner's) permissions (readable, writable,executable/traversable)
% -rw-r--r-- 1 loen DOS---- 89088 Dec 31 1969 schedule.doc
^^^ <= group permissions (NT groups are readable, not writable, not executable)
% -rw-rw-r-- 1 loen DOS---- 89088 Dec 31 1969 schedule.doc
^^^ <= world (all) users' permissions(readable, not writable or executable)
NOTE: web pages must be world readable.
NOTE: world _writable_ is not recommended!
5. OK, so fix this, finally!
- 1. For files:
% chmod g+w schedule.doc <=add group write permissions
- 2. For directories:
% chmod g+wx HIRES-CCD <= add group write permissions -- let any one in the electronics or engineering NT groups view files and change or add files.
NOTE: If you ever need to remove group write or read permissions, please let me know right away, so I don't accidentally clobber your changes!
3. Make your changes recursive (descend into directories, change all of their contents)
% chmod -R g+wx *
In our example, this command would make ALL directories in /u/loen/dwg2/hires group-writable.