Permission for user, group and others in Linux platform

UGO Mode permission

In Linux for any directory or there are three types off permission you can provide,

1)      Read

2)      Write

3)      Execute

If a directory have read permission then you can read the content of the directory, if the directory  has write permission then you can edit the content of the directory, if the directory has execute permission then you can run that directory if it is a program directory.

Read permission is indicated by “r”, write permission is indicated by “w” and execute permission is indicated by “x”. All these three permission can be given to three types of entities – User, Group and Others. User is the creator or owner of any particular file or directory. Group is a collection of user who has the same rights and community as the owner. Others are the collection of those users who do not belong to the group of the owner. User is indicated by “u” Group is indicated by “g”, others are indicated by “o”.

To provide permission use “+”and to take away permission use “-“permission can be given or withdrawn by the”chmod” command.

# chmod (space) u/g/o (space) +/- r/w/x (space) file/directory

 Example:

#chmod u + r testfolder  ( to grant read permission for user)

#chmod g + w testfolder  ( to grant write permission for group)

#chmod o + x  testfolder  ( to grant execute permission for others)

#chmod u - r testfolder  ( to revoke read permission from particular directory to  user)

#chmod g - w testfolder  (to revoke write permission from particular directory to  user)

#chmod o - x  testfolder  (to revoke execute permission from particular directory to  user)