What is Auto Master in Linux?
Autofs is a service in Linux like operating system which automatically mounts the file system and remote shares when it is accessed. Autofs service reads two files Master map file ( /etc/auto. master ) and a map file like /etc/auto. misc or /etc/auto.
Where is Auto Master in Linux?
The default location of the master map is /etc/auto. master but an alternate name may be given on the command line when running the automounter and the default master map may changed by setting the MASTER_MAP_NAME configuration variable in /etc/sysconfig/autofs.
What does Auto master do?
Automounting mounts remote file systems when they are accessed, rather than maintaining these remote mounts at all times. When the remote file systems are inactive, they are unmounted. This frees up system resources and improves overall system performance.
How do I start autofs?
The correct way to start the automount daemon is by running the /usr/sbin/automount script. The /usr/sbin/autofsmount entry in the automount script calls the code path where we load the kernel extension and read the maps to setup the autofs mounts.
What is autofs NFS?
Autofs is an automount daemon that manages mount points as needed. In short, it only mounts a given share when that share is being accessed and are unmounted after a defined period of inactivity.
What is NFS and autofs?
Autofs defined In short, it only mounts a given share when that share is being accessed and are unmounted after a defined period of inactivity. Automounting NFS shares in this way conserves bandwidth and offers better performance compared to static mounts controlled by /etc/fstab .
What is the use of autofs in Linux?
Purpose. The goal of autofs is to provide on-demand mounting and race free automatic unmounting of various other filesystems. This provides two key advantages: There is no need to delay boot until all filesystems that might be needed are mounted.
What is the purpose of the auto master map in autofs?
The auto.master map is consulted to set up automount managed mount points when the autofs (8) script is invoked or the automount (8) program is run. Each line describes a mount point and refers to an autofs map describing file systems to be mounted under the mount point.
What is the auto mount option?
It is an autofs specific option that is a pseudo mount option and so is given without a leading dash. It may be used with indirect map entries only, either in the master map (so it effects all map entries) or with individual map entries.
What are the automounter maps?
The automounter maps are FILE, NIS, NISPLUS or LDAP maps referred to by the master map of the automounter (see auto.master (5) ). These maps describe how file systems below the mount point of the map (given in the master map) are to be mounted.
What does autofs mount without leading dash mean?
This is an autofs specific option that is a pseudo mount option and so is given without a leading dash. It may be used either in the master map entry (so it effects all the map entries) or with individual map entries to prevent bind mounting of local NFS filesystems.