If none of these are used, chmod behaves as if “ a” had been used. o: Others, meaning people not governed by the u and g permissions.g: Group, meaning members of the group the file belongs to.u: User, meaning the owner of the file.We use indicators to represent these values, and form short “permissions statements” such as u+x, where “u” means ” user” (who), “+” means add (what), and “x” means the execute permission (which). Which: Which of the permissions are we setting?.What: What change are we making? Are we adding or removing the permission?.Who: Who we are setting permissions for.To use chmod to set permissions, we need to tell it: The owner, a user called dave, also has write permissions.įor all of the other files (apart from the mh.sh script file) dave and members of the dave group have read and write properties on the files, and the others have read permissions only.įor the special case of the mh.sh script file, the owner dave and the group members have read, write, and execute permissions, and the others have read and execute permissions only. So, to summarise, group members and others have read and execute permissions. These people (called”others”) have read and execute permissions on this directory. These permissions apply to people who are not governed by the first two sets of permissions. The final set of three characters are also r-x. They do not have write permissions, so they cannot create, edit, or delete files. That means they can list the files and their contents in the directory, and they can cd (execute) into that directory. These show that the members of the dave group have read and execute permissions for this directory. The second set of three characters are the group permissions, these are r-x. This means the user dave has read, write and execute permissions for that directory. The r, w, and x characters are all present.
HOW DO I SET THE R ID IN SIEMENS STEP 7 FULL
These show that the owner has full permissions. The next three characters are the user permissions for this directory. This line refers to a directory called “archive.” The owner of the directory is “dave,” and the name of the group that the directory belongs to is also called “dave.” In our screenshot, the first line starts with a d. The read, write, and execute indicators are all present. rwx means full permissions have been granted.- means no permissions have been granted at all.If the file is a script or a program, it can be run (executed). The file can be edited, modified, and deleted. The file can be opened, and its content viewed. If the character is an r, w, or an x, that permission has been granted. If the character is a dash, it means that permission is not granted. The characters are indicators for the presence or absence of one of the permissions. They are either a dash ( -) or a letter. There are three characters in each set of permissions. The last three characters show the permissions for anyone not in the first two categories ( other permissions).The middle three characters show the permissions for members of the file’s group ( group permissions).The first three characters show the permissions for the user who owns the file ( user permissions).The next nine characters represent the settings for the three sets of permissions. On each line, the first character identifies the type of entry that is being listed.