Fs 1 5 7 – Note Manager Objective

The fs utility is used to manipulate the AFS filesystem. Note that the fs utility does not modify the traditional UNIX filesystem, only files in AFS.

The fs utility provides several commands:

apropos: locate commands by keyword
arladebug: tweek arla-debugging flags
checkservers: check if servers are up
checkvolumes: check that all volume mapping are correct
cleanacl: not yet implemented
copyacl: not yet implemented
diskfree: show free partition space
examine: examine volume status
flush: remove file from cache
flushvolume: remove volumedata (and files in volume) from cache
gcpags: garbage collect pags
getcacheparms: get cache usage
getcrypt: get encrypt status
getcellstatus: get suid cell status
getfid: get fid
getserverprefs: not yet implemented
getstatistics: get statistics from the cache manager
getpriority: get priority of a file/dir
gp: shorthand for the getpriority command
getmaxpriority: get max priority for a file gc
gmp: shorthand for the getmaxpriority command
help: get help for fs
incompat: report interface of the pioctl interface
listacl: show acl
la: shorthand for the listacl command
listcells: list cells that the cache handler can communicate with
listquota: show volume quota
lq: shorthand for the listquota command
quota: shorthand for the listquota command
lsmount: show a mount point
messages: not yet implemented
mkmount: create mount point
mkm: shorthand of the mkmount command
connect: connect mode
monitor: set remote logging host
newcell: add new cell
nop: do a pioctl-nop
quit: leave interactive mode
exit: leave interactive mode
rmmount: delete a mount point
removepriority: remove priority from file/directory
rmp: shorthand for the removepriority command
setacl: add an acl entry on a directory
sa: shorthand for the setacl command
setcachesize: change disk cache size
setcell: change cell status
setpriority: set priority of a file/directory
sp: shorthand for the setpriority command
setmaxpriority: set upper limit of prio gc
smq: shorthand for the setmaxpriority command.
setquota: change quota on a volume
sq: shorthand for the setquota command
setserverprefs: not yet implemented
setcrypt: set encryption on/off
setvol: not yet implemented
suidcells: list status of cells
sysname: read/change sysname
version: get version of fs and fs_lib
venuslog: make arlad print status
whereis: show server(s) of file
whichcell: show cell of file
wscell: display cell of workstation
nnpfsdebug: tweek nnpfs-debugging flags
nnpfsprint: make nnpfs print debug info

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Most fs commands accept the following general arguments:

[-cellcellname] Specifies which AFS cell to use, if the default cell is not to be used.

[-noauth] Specifies that fs should not try to authenticate the connection to the server. This may be useful with shell scripts, or if there is a problem with the AFS cell. Note that the server will reject many commands if -noauth is specified.

The syntax of the fs commands:

fs apropos

fs arladebug [flags] [-cellcellname] [-noauth]

Tweek arla-debugging flags.

fs checkservers [-cellcellname] [-noauth] [-nopoll]

Check if the servers in a cell are available. If -nopoll is specified, the servers are not contactad; only internal information is printed.

fs checkvolumes

Check that all volume mapping are correct and flush all mountpoints from the cache to force them to be reread.

fs cleanacl

fs copyacl

Not yet implemented.

fs diskfreepath

Show free space on the partition where the file or directory path is stored

fs examine [path]

Print detailed information about the volume mounted on the specified path or the current directory.

fs flushfile

Flush file from the cache, causing it to be stored on the fileserver.

fs flushvolumefile

Flush all the files in the volume where the file is stored, causing them to be stored on the fileserver. Meta information about the volume is also flushed.

fs gcpags

fs getcacheparms

Print information about cache usage.

fs getcrypt

Display whether traffic between the client and server is encrypted.

fs getcellstatuscellname

Indicate if the setuid bit on executable files are honored for the specified cell.

fs getfidpath

fs getserverprefs

Not yet implemented.

fs getstatistics

Get statistics from the cache manager. Possible type to get statistics for are fetchstatus, fetchdata, storestatus, storedata, bulkstatus.

fs getpriority

fs gp

Shorthand for the getpriority command

fs getmaxpriority

fs gmp [-cellcellname] [-noauth]

Shorthand for the getmaxpriority command.

fs help [-cellcellname] [-noauth]

fs incompat

returns what interface of the pioctl interface currently is in use.

fs listaclpath

Show acl for the specified path or the current directory.

fs la [-cellcellname] [-noauth]

fs listcells

List cells that the cache handler can communicate with. These are the cells listed in the file /etc/afs/CellServDB.

fs listquota [path]

Show the quota for the volume of the path specified.

fs lq [path]

fs quota [-cellcellname] [-noauth]

Shorthand for the listquota command.

fs lsmountpath

fs messages

Not yet implemented.

fs mkmountdirectoryvolume [-cellcell] [-rw]

Create a mountpoint point to volume in optional cell. If -rw is given, a mountpoint to the readwrite volume is created.

Note that there must not exist a directory named like the mount point you are creating.

fs connect [mode]

Set or get connected mode, if a mode is specified, the cache manager will be set to that mode. If not, the current mode will be printed.

Fs 1 5 7 – Note Manager Objective Example

Valid modes are:

connected: Connected mode - this is the normal operating mode.
fetch: Fetch only mode - files are retrieved from fileserver but are not stored back.
disconnected: Disconnected mode - files are read and written from/to the cache, and no attempt is made to contact a fileserver-

Disconnected mode is very useful for machines that are not connected to the network at all times, such as laptops. Disconnected mode is to be considered very experimental at this stage.

fs monitor

fs newcell-cellcellname-serversvldb-servers [-help]

Add a new cell to the running configuration of the cache manager, or update already existing information. This information should also be entered in the file /etc/afs/CellServDB.

fs nop

fs quit

Leave interactive mode.

fs exit

fs rmmountmountpoint

Delete mountpoint.

Fs 1 5 7 – Note Manager Objective Description

fs removeprioritypath

fs rmp

Shorthand for the removepriority command.

fs setacl

Add an acl entry on a directory. Each entry consists of two components: a user or group and a character string describing the permissions granted for that user or group. These characters and the permission they represent are:

r: read the files
l: list the files
i: insert new files
d: delete files
w: write (change) the files
k: lock files
a: administer the acl, that is, to change the acl

There are also a few convinience strings recognized by fs setacl:

none: removes all permissions.
read: adds 'rl' permissions, which are suitable for a read-only directory.
write: adds all permissions except 'a', that is, the user/group can read, write, delete etc. but not change the acl of the directory.
all: add all permissions.

Fs 1 5 7 – Note Manager Objective Resume

Note that in AFS you set the permissions on a directory, and the permissions of a file are those of their directory. So, if you move a file from one directory to another, you might change the permission of the file, as the two directories may have different permissions.

Of the traditional UNIX permission bits only the user part is honored, and is used for any user permissioned by the directorys acl. The group and world permission bits are ignored, but they are stored.

fs sa

fs setcachesizelowvnodes [highvnodeslowbyteshighbytes]

Set the size of the disk cache.

fs setcell

fs setpriorityfilepriority

Set priority of a file/directory.

fs sp

fs setmaxprioritypriority

Set upper limit of priority.

fs smq

fs setquotapathquota

Set the quota (in Kbytes) on a volume pointed out by path.

fs sq

fs setserverprefs

Not yet implemented.

fs setcryptyesno

If no is specified, encryption of the traffic to/from fileservers is disabled, and if yes is specified, it is enabled.

fs setvol

fs suidcells

Print cells and whether setuid execution is allowed for them.

fs sysname [sysname]

fs version

Print version of fs and fs_lib.

fs venuslog

fs whereis [path]

Show server(s) of the specified file or the current directory.

fs whichcell [path]

fs wscell

Display default cell of the client.

fs nnpfsdebug

fs nnpfsprint [flags]

Make nnpfs print debug info.