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FS(1) AFS Command Reference FS(1)


fs - Introduction to the fs command suite


The commands in the fs command suite constitute the main administrative interface to the Cache Manager on an AFS client machine, which is responsible for fetching AFS data from file server machines on behalf of applications running on the client machine.

There are several categories of commands in the fs command suite:

  • Commands to set and report how the Cache Manager interacts with server machines: fs checkservers, fs getcellstatus, fs getcrypt, fs getserverprefs, fs getverify, fs listcells, fs newcell, fs setcbaddr, fs setcell, fs setcrypt, fs setserverprefs, fs setverify, fs sysname, fs uuid, and fs wscell.
  • Commands to administer access control lists (ACLs): fs cleanacl, fs copyacl, fs getcalleraccess, fs listacl, and fs setacl.
  • Commands to administer server machines, volumes or partitions that house a given file or directory: fs diskfree, fs examine, fs getfid, fs listquota, fs quota, fs setquota, fs setvol, fs whereis, and fs whichcell.
  • Commands to administer the local client cache and related information: fs bypassthreshold, fs checkvolumes, fs cscpolicy, fs flush, fs flushall, fs flushvolume, fs getcacheparms, fs listaliases, fs newalias, and fs setcachesize.
  • Commands to administer volume mount points: fs lsmount, fs mkmount, and fs rmmount.
  • Commands to control monitoring and tracing: fs debug, fs memdump, fs messages, fs minidump, fs monitor, fs rxstatpeer, fs rxstatproc, and fs trace.
  • A command to administer the Cache Manager's interaction with other file systems: fs exportafs.
  • Commands to obtain help: fs apropos and fs help.
  • A command to display the OpenAFS command suite version: fs version.

The Cache Manager and the fs commands use and maintain the following configuration files:

Lists the database server machines in the local cell and any foreign cell to which the administrator wishes to enable AFS access for users working on the machine. The database server machines run the Authentication, Backup, Protection and Volume Location (VL) Server processes, which maintain databases of administrative information. For users to access a cell, its "root.cell" volume must also be mounted in the local cell's AFS file tree.
Defines the machine's cell membership with respect to the AFS command suites and Cache Manager access to AFS data.
Defines configuration parameters for the cache, including its size and whether it is in memory or on disk.

In addition, the Cache Manager automatically creates files on the cache partition (by default, /usr/vice/cache for caching and tracking files fetched from file server machines.

For more details, see the reference page for each file.


The following flag is available on every command in the fs suite. The reference page for each command also lists it, but it is described here in greater detail.

Prints a command's online help message on the standard output stream. Do not combine this flag with any of the command's other options; when it is provided, the command interpreter ignores all other options, and only prints the help message.


The privileges required for fs commands vary more than for other command suites. Pay special attention to the PRIVILEGE REQUIRED section of each command description.

The various types of necessary privilege include:

  • Having permissions on a directory's ACL. For example, creating and removing mount points requires "a" (administer), "i" (insert), and "d" (delete) permissions on the ACL of the directory in which the mount point resides.
  • Being logged onto the machine as the local superuser "root". This is necessary when issuing commands that affect Cache Manager configuration.
  • Belonging to the system:administrators group in the Protection Database.
  • No privilege. Many fs commands simply list information.


afs_cache(5), CellServDB(5), ThisCell(5) cacheinfo(5), fs_apropos(1), fs_checkservers(1), fs_checkvolumes(1), fs_cleanacl(1), fs_copyacl(1), fs_cscpolicy(1), fs_diskfree(1), fs_examine(1), fs_exportafs(1), fs_flush(1), fs_flushall(1), fs_flushmount(1), fs_flushvolume(1), fs_getcacheparms(1), fs_getcalleraccess(1), fs_getcellstatus(1), fs_getclientaddrs(1), fs_getcrypt(1), fs_getfid(1), fs_getserverprefs(1), fs_getverify(1), fs_help(1), fs_listacl(1), fs_listaliases(1), fs_listcells(1), fs_listquota(1), fs_lsmount(1), fs_memdump(1), fs_messages(1), fs_minidump(1), fs_mkmount(1), fs_monitor(1), fs_newalias(1), fs_newcell(1), fs_quota(1), fs_rmmount(1), fs_rxstatpeer(1), fs_rxstatproc(1), fs_setacl(1), fs_setcachesize(1), fs_setcbaddr(1), fs_setcell(1), fs_setclientaddrs(1), fs_setcrypt(1), fs_setquota(1), fs_setserverprefs(1), fs_setverify(1), fs_setvol(1), fs_storebehind(1), fs_sysname(1), fs_trace(1), fs_whereis(1), fs_whichcell(1), fs_wscell(1)


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2024-06-30 OpenAFS