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Adds read permission for all classes (i.e. user, Group and Others) chmod a-x publicComments.txt: Removes execute permission for all classes chmod a+rx viewer.sh: Adds read and execute permissions for all classes chmod u=rw,g=r,o= internalPlan.txt: Sets read and write permission for user, sets read for Group, and denies access for Others
In some cases, menu options or functions may be made visible or hidden depending on a user's permission level; this kind of user interface is referred to as permission-driven. Two types of permissions are widely available: POSIX file system permissions and access-control lists (ACLs) which are capable of more specific control.
After authentication, and if the configuration file permits the user access, the system invokes the requested command. sudo retains the user's invocation rights through a grace period (typically 5 minutes) per pseudo terminal, allowing the user to execute several successive commands as the requested user without having to provide a password again.
It includes all commands that are standardized by the Internet Engineering Task Force (IETF) in RFC 959, plus extensions. Note that most command-line FTP clients present their own non-standard set of commands to users. For example, GET is the common user command to download a file instead of the raw command RETR.
Sudo command on Ubuntu to temporarily assume root privileges. Most Unix and Unix-like systems have an account or group which enables a user to exact complete control over the system, often known as a root account. If access to this account is gained by an unwanted user, this results in a complete breach of the system.
allows read permission to be enabled for all user classes; the rest of the mask bits are unchanged umask a-x: prohibits enabling execute permission for all user classes; the rest of the mask bits are unchanged umask a+rw: allows read or write permission to be enabled for all user classes; the rest of the mask bits are unchanged umask +rwx
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In computer security, an access-control list (ACL) is a list of permissions [a] associated with a system resource (object or facility). An ACL specifies which users or system processes are granted access to resources, as well as what operations are allowed on given resources. [1] Each entry in a typical ACL specifies a subject and an operation.