Permission and Ownership using awk

Awk programming

The easiest way to learn the awk command usage is to see them in action.

In order to find the working directory we are in .

Type pwd ( "print working directory" )

Then type ls ( listing)for listing to see what's in the current directory

$ ls

Permissions and Ownership

List directories and files

ls -al # shows something like this for each file/dir: drwxrwxrwx
  # d: directory
  # rwx: read write execute
  # first triplet: user permissions (u)
  # second triplet: group permissions (g)
  # third triplet: world permissions (o) 

It shows like this when we type  

$ls -al 

drwxr-xr-x 2 prakash prakash 4096 Oct 27 03:56 Videos drwxr-xr-x 2 prakash prakash 4096 Nov 18 10:19 .vim-rw------- 1 prakash prakash 11158 Dec 16 18:54 .viminfo-rw------- 1 prakash prakash 124 Dec 16 18:11 .Xauthority-rw------- 1 prakash prakash 82 Dec 16 18:11 .xsession-errors

Assign write and execute permissions to user and group

chmod ug+rx my_file

To remove all permissions from all three user groups

chmod ugo-rwx my_file
# '+' causes the permissions selected to be added
# '-' causes them to be removed
# '=' causes them to be the only permissions that the file has.
 chmod +rx public_html/ or $ chmod 755 public_html/ #Example for number system: