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MOUNT(8) MAINTENANCE COMMANDS MOUNT(8)
NAME
mount, umount - mount and unmount file systems
SYNOPSIS
/usr/etc/mount [ -fnrv ] [ -t _t_y_p_e ] [ -o _o_p_t_i_o_n_s ] _f_i_l_e_s_y_s_-
_t_e_m _d_i_r_e_c_t_o_r_y
/usr/etc/umount [ -v ] _f_i_l_e_s_y_s_t_e_m|_d_i_r_e_c_t_o_r_y ...
DESCRIPTION
mount attaches a named _f_i_l_e_s_y_s_t_e_m to the file system hierar-
chy at the pathname location _d_i_r_e_c_t_o_r_y, which must already
exist. If _d_i_r_e_c_t_o_r_y has any contents prior to the mount
operation, these remain hidden until the _f_i_l_e_s_y_s_t_e_m is once
again unmounted. If _f_i_l_e_s_y_s_t_e_m is of the form
_h_o_s_t:_p_a_t_h_n_a_m_e, it is assumed to be an NFS file system (type
nfs).
umount unmounts a currently mounted file system, which can
be specified either as a _d_i_r_e_c_t_o_r_y or a _f_i_l_e_s_y_s_t_e_m.
mount and umount maintain a table of mounted file systems in
/etc/mtab, described in fstab(5). If invoked without an
argument, mount displays the contents of this table.
OPTIONS
mount
-f Fake an /etc/mtab entry, but do not actually mount any
file systems.
-n Mount the file system without making an entry in
/etc/mtab.
-v Verbose. Display a message indicating each file system
being mounted.
-r Mount the specified file system read-only, even if the
entry in /etc/fstab specifies that it is to be mounted
read-write.
Physically write-protected and magnetic-tape file sys-
tems must be mounted read-only. Otherwise errors occur
when the system attempts to update access times, even
if no write operation is attempted.
-o _o_p_t_i_o_n_s
Specify file system _o_p_t_i_o_n_s, a comma-separated list of
words from the list below. Some options are valid for
all file system types, while others apply to a specific
type only.
_o_p_t_i_o_n_s valid on _a_l_l file systems:
rw|ro Read/write or read-only.
suid|nosuid Setuid execution allowed or disal-
lowed.
The default is `rw,suid'.
_o_p_t_i_o_n_s specific to nfs (NFS) file systems:
rsize=_n Set the read buffer size to _n bytes.
wsize=_n Set the write buffer size to _n
bytes.
timeo=_n Set the NFS timeout to _n tenths of a
second.
retrans=_n The number of NFS retransmissions.
port=_n The server IP port number.
acregmin=_n Hold cached attributes for at least
_n seconds after file modification.
acregmax=_n Hold cached attributes for no more
than _n seconds after file modifica-
tion.
acdirmin=_n Hold cached attributes for at least
_n seconds after directory update.
acdirmax=_n Hold cached attributes for no more
than _n seconds after directory
update.
actimeo=_n Set _m_i_n and _m_a_x times for regular
files and directories to _n seconds.
actimeo has no default; it sets acregmin, acreg-
max, acdirmin and acdirmax
Defaults for rsize and wsize are set internally by
the system kernel.
umount
-v Verbose. Display a message indicating each file system
being unmounted.
EXAMPLES
To mount a remote file system:
mount serv:/usr/src /usr/src
To mount a remote file system read-only:
mount -o ro serv:/usr/src /usr/src
FILES
/etc/mtab table of mounted file systems
SEE ALSO
mkdir(2V), open(2V), fstab(5), mtab(5), automount(8),
mountd(8C), nfsd(8)
BUGS
As for now, it is only possible to mount a remote file system in
/nfs.