sca_sles15 Exam Dumps : SUSE Certified Administrator in Enterprise Linux 15

The UID that the root user has is 0. The UID (user ID) is a numeric value that uniquely identifies a user on the system. The root user is the superuser or administrator who has full privileges and access to all files and commands on the system. The root user always has the UID of 0, regardless of its name or password. References:

The types of files that are used for inter-process communications are pipe and socket files. Pipe files are used for unidirectional data flow between two processes. They can be created with the mkfifo command or with the | operator in a shell command. Socket files are used for bidirectional data exchange between processes on the same or different machines. They can be created with various system calls or commands depending on the protocol and domain. References:

The execute permission on a directory means you can use the cd command to change into the directory. It also means you can access the files and subdirectories inside the directory, if you have read permission on them. The execute permission does not affect the visibility or exportability of the directory. References: