![]() ![]() The options noauto and user are usually combined for removable media such as floppy disk or CD-ROM drives. This option causes the default options rw, suid, dev, exec, auto, nouser, and async to be used. Normally, this is a privilege of the user root. This option lets users mount the file system. File systems set with the option noauto in the file /etc/fstab are not mounted automatically when the system is booted. ![]() Some options only make sense in the file /etc/fstab. The nosuid option ensures that the suid and sgid bits in the file system are ignored. You can prohibit the execution of programs on a file system with the option noexec. The nodev option prevents device files from being interpreted as such in the file system. The option noatime should improve the performance. These options set whether the access time of a file is updated in the inode (atime) or not (noatime). These options set synchronous (sync) or asynchronous (async) input and output in a file system. These options indicate whether a file system should be writable (rw) or only readable (ro). When you make a change to the options in /etc/fstab, you can use remount to incorporate the changes. This option causes file systems that are already mounted to be mounted again. The following are some of the options you can use when mounting a file system with the command mount or by entering them in /etc/fstab. You do not usually specify the file system type because it is recognized automatically (using magic numbers in the superblock, or simply by trying different file system types see man mount for details). ![]()
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