The POSIX permissions are that each file or directory has an owner, group, and other with read, write, and executable bits, but only one user and one group. ACL are an extended set of permissions.
Each file and directory has three user based permission groups: Owner/User (u)- The Owner permissions apply only the owner of the file or directory, they will not impact the actions of other users. Group (g)- The Group permissions apply only to the group that has been assigned to the file or directory, they will not
There is more than one package that provide ftp server service but we will use the most secure one as its name says (Very Secure FTP) VSFTP server , let’s go..
To install PXE server on Centos to provide automated installation for PCs and servers through our network without human interaction, the client needs and IP at boot for connecting to PXE server which is provided by DHCP ,