According to Linux Standard Base, the nobody user is “Used by NFS”. In fact the NFS daemon is one of the few that still needs the nobody user. If the owner of a file or directory in a mounted NFS share doesn’t exist at the local system, it is replaced by the nobody user and its group.
What does No_root_squash mean?
no_root_squash – Allows root users on client computers to have root access on the server. Mount requests for root are not be mounted to the anonomous user. This option is needed for diskless clients.
What is NFS root squash?
Root squash is a special mapping of the remote superuser (root) identity when using identity authentication (local user is the same as remote user). Under root squash, a client’s uid 0 (root) is mapped to 65534 (nobody). It is primarily a feature of NFS but may be available on other systems as well.
What is the use of NFS in Linux?
A Network File System (NFS) allows remote hosts to mount file systems over a network and interact with those file systems as though they are mounted locally. This enables system administrators to consolidate resources onto centralized servers on the network.
How do I find the Fsid in Linux?
1 Answer. You can use the mountpoint command. The -d switch prints the major/minor device number of the mount point to stdout.
What is Exportfs in Linux?
exportfs stands for export file system, which exports file system to a remote server which can mount, and access it like a local file system. You can also unexport the directories using exportfs command.
What are three levels of security in Linux?
For each level of access control (user, group, other), the 3 bits correspond to three permission types. For regular files, these 3 bits control read access, write access, and execute permission. For directories and other file types, the 3 bits have slightly different interpretations.
Is NFS secure?
NFS itself is not generally considered secure – using the kerberos option as @matt suggests is one option, but your best bet if you have to use NFS is to use a secure VPN and run NFS over that – this way you at least protect the insecure filesystem from the Internet – ofcourse if someone breaches your VPN you’re …
What is No_subtree_check?
no_subtree_check This option disables subtree checking, which has mild security implications, but can improve reliability in some circumstances.
Which is better SMB or NFS?
Conclusion. As you can see NFS offers a better performance and is unbeatable if the files are medium sized or small. If the files are large enough the timings of both methods get closer to each other. Linux and Mac OS owners should use NFS instead of SMB.
What is FTP in Linux?
FTP (File Transfer Protocol) is a standard network protocol used to transfer files to and from a remote network. … However, the ftp command is useful when you work on a server without GUI and you want to transfer files over FTP to or from a remote server.
Why NFS is used?
NFS, or Network File System, was designed in 1984 by Sun Microsystems. This distributed file system protocol allows a user on a client computer to access files over a network in the same way they would access a local storage file. Because it is an open standard, anyone can implement the protocol.
What is Fsid in NFS?
fsid=num|root|uuid. NFS needs to be able to identify each filesystem that it exports. Normally it will use a UUID for the filesystem (if the filesystem has such a thing) or the device number of the device holding the filesystem (if the filesystem is stored on the device).