computoman

Admin hint of the day: Understanding permissions on linux at first can be unsettling. There are several applications that you can access on-line to make it easier. If you have your own server, you can setup the application there and not be dependent on the net. For more information see: http://catcode.com/teachmod/

With more and more people using the command line, changing permissions is a must. Chmod (chmod) is used to change permissions of a file. Do not use it that much except when setting permissions on the .ssh folder or on a web server application directories i.e. $ sudo chmod -R 755 appdirectory or $ chmod 700 ~/.ssh $ chmod 600 ~/.ssh/* Explanation examples: Permissions Command User Group World rwx rwx rwx chmod 777 filename rwx rwx r-x chmod 775 filename rwx r-x r-x chmod 755 filename rw- rw- r-- chmod 664 filename rw- r-- r-- chmod 644 filename r = readable  w = writable x = executable  - = no permission Here is another way of looking at it: ugw --- function 400 r-- read by owner 040 -r- read by group 004 --r read by anybody (other) 200 w-- write by owner 020 -w- write by group 002 --w write by anybody 100 x-- execute by owner 010 -x- execute by group 001 --x execute by anybody To get a combination, just add them up....