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diff --git a/misc-utils/findmnt.8 b/misc-utils/findmnt.8 new file mode 100644 index 0000000..e411c30 --- /dev/null +++ b/misc-utils/findmnt.8 @@ -0,0 +1,308 @@ +.TH FINDMNT 8 "May 2018" "util-linux" "System Administration" +.SH NAME +findmnt \- find a filesystem +.SH SYNOPSIS +.B findmnt +[options] +.sp +.B findmnt +[options] +.IR device | mountpoint +.sp +.B findmnt +[options] +.RB [ \-\-source ] +.I device +.RB [ \-\-target | \-\-mountpoint ] +.I mountpoint +.SH DESCRIPTION +.B findmnt +will list all mounted filesystems or search for a filesystem. The +.B \%findmnt +command is able to search in +.IR /etc/fstab , +.I /etc/mtab +or +.IR /proc/self/mountinfo . +If +.I device +or +.I mountpoint +is not given, all filesystems are shown. +.PP +The device may be specified by device name, major:minor numbers, +filesystem label or UUID, or partition label or UUID. Note that +.B \%findmnt +follows +.BR mount (8) +behavior where a device name may be interpreted +as a mountpoint (and vice versa) if the \fB\-\-target\fR, \fB\-\-mountpoint\fR or +\fB\-\-source\fR options are not specified. +.PP +The command prints all mounted filesystems in the tree-like format by default. +.SH OPTIONS +.TP +.BR \-A , " \-\-all" +Disable all built-in filters and print all filesystems. +.TP +.BR \-a , " \-\-ascii" +Use ascii characters for tree formatting. +.TP +.BR \-b , " \-\-bytes" +Print the SIZE, USED and AVAIL columns in bytes rather than in a human-readable format. +.TP +.BR \-C , " \-\-nocanonicalize" +Do not canonicalize paths at all. This option affects the comparing of paths +and the evaluation of tags (LABEL, UUID, etc.). +.TP +.BR \-c , " \-\-canonicalize" +Canonicalize all printed paths. +.TP +.BR \-D , " \-\-df" +Imitate the output of +.BR df (1). +This option is equivalent to +.B \-o\ SOURCE,FSTYPE,SIZE,USED,AVAIL,USE%,TARGET +but excludes all pseudo filesystems. +Use \fB\-\-all\fP to print all filesystems. +.TP +.BR \-d , " \-\-direction \fIword\fP" +The search direction, either +.B forward +or +.BR backward . +.TP +.BR \-e , " \-\-evaluate" +Convert all tags (LABEL, UUID, PARTUUID or PARTLABEL) to the corresponding device names. +.TP +.BR \-F , " \-\-tab\-file \fIpath\fP" +Search in an alternative file. If used with \fB\-\-fstab\fP, \fB\-\-mtab\fP +or \fB\-\-kernel\fP, then it overrides the default paths. If specified more +than once, then tree-like output is disabled (see the \fB\-\-list\fP option). +.TP +.BR \-f , " \-\-first\-only" +Print the first matching filesystem only. +.TP +.BR \-h , " \-\-help" +Display help text and exit. +.TP +.BR \-i , " \-\-invert" +Invert the sense of matching. +.TP +.BR \-J , " \-\-json" +Use JSON output format. +.TP +.BR \-k , " \-\-kernel" +Search in +.IR /proc/self/mountinfo . +The output is in the tree-like format. This is the default. The output +contains only mount options maintained by kernel (see also \fB\-\-mtab)\fP. +.TP +.BR \-l , " \-\-list" +Use the list output format. This output format is automatically enabled if the +output is restricted by the \fB\-t\fP, \fB\-O\fP, \fB\-S\fP or \fB\-T\fP +option and the option \fB\-\-submounts\fP is not used or if more that one +source file (the option \fB\-F\fP) is specified. +.TP +.BR \-M , " \-\-mountpoint \fIpath\fP" +Explicitly define the mountpoint file or directory. See also \fB\-\-target\fP. +.TP +.BR \-m , " \-\-mtab" +Search in +.IR /etc/mtab . +The output is in the list format by default (see \fB\-\-tree\fP). The output may include user +space mount options. +.TP +.BR \-N , " \-\-task \fItid\fP" +Use alternative namespace /proc/<tid>/mountinfo rather than the default +/proc/self/mountinfo. If the option is specified more than once, then +tree-like output is disabled (see the \fB\-\-list\fP option). See also the +.BR unshare (1) +command. +.TP +.BR \-n , " \-\-noheadings" +Do not print a header line. +.TP +.BR \-O , " \-\-options \fIlist\fP" +Limit the set of printed filesystems. More than one option +may be specified in a comma-separated list. The +.B \-t +and +.B \-O +options are cumulative in effect. It is different from +.B \-t +in that each option is matched exactly; a leading +.I no +at the beginning does not have global meaning. The "no" can used for +individual items in the list. The "no" prefix interpretation can be disabled +by "+" prefix. +.TP +.BR \-o , " \-\-output \fIlist\fP" +Define output columns. See the \fB\-\-help\fP output to get a list of the +currently supported columns. The +.B TARGET +column contains tree formatting if the +.B \-\-list +or +.B \-\-raw +options are not specified. + +The default list of columns may be extended if \fIlist\fP is +specified in the format \fI+list\fP (e.g., \fBfindmnt \-o +PROPAGATION\fP). +.TP +.B \-\-output\-all +Output almost all available columns. The columns that require +.B \-\-poll +are not included. +.TP +.BR \-P , " \-\-pairs" +Use key="value" output format. All potentially unsafe characters are hex-escaped (\\x<code>). +.TP +.BR \-p , " \-\-poll\fR[\fI=list\fR]" +Monitor changes in the /proc/self/mountinfo file. Supported actions are: mount, +umount, remount and move. More than one action may be specified in a +comma-separated list. All actions are monitored by default. + +The time for which \fB\-\-poll\fR will block can be restricted with the \fB\-\-timeout\fP +or \fB\-\-first\-only\fP options. + +The standard columns always use the new version of the information from the +mountinfo file, except the umount action which is based on the original +information cached by +.BR findmnt (8). +The poll mode allows using extra columns: +.RS +.TP +.B ACTION +mount, umount, move or remount action name; this column is enabled by default +.TP +.B OLD-TARGET +available for umount and move actions +.TP +.B OLD-OPTIONS +available for umount and remount actions +.RE +.TP +.B \-\-pseudo +Print only pseudo filesystems. +.TP +.BR \-R , " \-\-submounts" +Print recursively all submounts for the selected filesystems. The restrictions +defined by options \fB\-t\fP, \fB\-O\fP, \fB\-S\fP, \fB\-T\fP and +\fB\%\-\-direction\fP are not applied to submounts. All submounts are always +printed in tree-like order. The option enables the tree-like output format by +default. This option has no effect for \fB\-\-mtab\fP or \fB\-\-fstab\fP. +.TP +.BR \-r , " \-\-raw" +Use raw output format. All potentially unsafe characters are hex-escaped (\\x<code>). +.TP +.B \-\-real +Print only real filesystems. +.TP +.BR \-S , " \-\-source \fIspec\fP" +Explicitly define the mount source. Supported specifications are \fIdevice\fR, +\fImaj\fB:\fImin\fR, \fBLABEL=\fIlabel\fR, \fBUUID=\fIuuid\fR, +\fBPARTLABEL=\fIlabel\fR and \fBPARTUUID=\fIuuid\fR. +.TP +.BR \-s , " \-\-fstab" +Search in +.IR /etc/fstab . +The output is in the list format (see \fB\-\-list\fR). +.TP +.BR \-T , " \-\-target \fIpath\fP" +Define the mount target. If \fIpath\fR +is not a mountpoint file or directory, then +.B findmnt +checks the \fIpath\fR elements in reverse order to get the mountpoint (this feature is +supported only when searching in kernel files and unsupported for \fB\-\-fstab\fP). It's +recommended to use the option \fB\-\-mountpoint\fR when checks of \fIpath\fR elements are +unwanted and \fIpath\fR is a strictly specified mountpoint. +.TP +.BR \-t , " \-\-types \fIlist\fP" +Limit the set of printed filesystems. More than one type may be +specified in a comma-separated list. The list of filesystem types can be +prefixed with +.B no +to specify the filesystem types on which no action should be taken. For +more details see +.BR mount (8). +.TP +.B \-\-tree +Enable tree-like output if possible. The options is silently ignored for +tables where is missing child-parent relation (e.g., fstab). +.TP +.BR \-U , " \-\-uniq" +Ignore filesystems with duplicate mount targets, thus effectively skipping +over-mounted mount points. +.TP +.BR \-u , " \-\-notruncate" +Do not truncate text in columns. The default is to not truncate the +.BR TARGET , +.BR SOURCE , +.BR UUID , +.BR LABEL , +.BR PARTUUID , +.B PARTLABEL +columns. This option disables text truncation also in all other columns. +.TP +.BR \-v , " \-\-nofsroot" +Do not print a [/dir] in the SOURCE column for bind mounts or btrfs subvolumes. +.TP +.BR \-w , " \-\-timeout \fImilliseconds\fP" +Specify an upper limit on the time for which \fB\-\-poll\fR will block, in milliseconds. +.TP +.BR \-x , " \-\-verify" +Check mount table content. The default is to verify +.I /etc/fstab +parsability and usability. It's possible to use this option also with \fB\-\-tab\-file\fP. +It's possible to specify source (device) or target (mountpoint) to filter mount table. The option +\fB\-\-verbose\fP forces findmnt to print more details. +.TP +.B \-\-verbose +Force findmnt to print more information (\fB\-\-verify\fP only for now). +.SH ENVIRONMENT +.IP LIBMOUNT_FSTAB=<path> +overrides the default location of the fstab file +.IP LIBMOUNT_MTAB=<path> +overrides the default location of the mtab file +.IP LIBMOUNT_DEBUG=all +enables libmount debug output +.IP LIBSMARTCOLS_DEBUG=all +enables libsmartcols debug output +.IP LIBSMARTCOLS_DEBUG_PADDING=on +use visible padding characters. Requires enabled LIBSMARTCOLS_DEBUG. +.SH EXAMPLE +.IP "\fBfindmnt \-\-fstab \-t nfs\fP" +Prints all NFS filesystems defined in +.IR /etc/fstab . +.IP "\fBfindmnt \-\-fstab /mnt/foo\fP" +Prints all +.I /etc/fstab +filesystems where the mountpoint directory is /mnt/foo. It also prints bind mounts where /mnt/foo +is a source. +.IP "\fBfindmnt \-\-fstab \-\-target /mnt/foo\fP" +Prints all +.I /etc/fstab +filesystems where the mountpoint directory is /mnt/foo. +.IP "\fBfindmnt \-\-fstab \-\-evaluate\fP" +Prints all +.I /etc/fstab +filesystems and converts LABEL= and UUID= tags to the real device names. +.IP "\fBfindmnt \-n \-\-raw \-\-evaluate \-\-output=target LABEL=/boot\fP" +Prints only the mountpoint where the filesystem with label "/boot" is mounted. +.IP "\fBfindmnt \-\-poll \-\-mountpoint /mnt/foo\fP" +Monitors mount, unmount, remount and move on /mnt/foo. +.IP "\fBfindmnt \-\-poll=umount \-\-first-only \-\-mountpoint /mnt/foo\fP" +Waits for /mnt/foo unmount. +.IP "\fBfindmnt \-\-poll=remount \-t ext3 \-O ro\fP" +Monitors remounts to read-only mode on all ext3 filesystems. +.SH AUTHORS +.nf +Karel Zak <kzak@redhat.com> +.fi +.SH SEE ALSO +.BR fstab (5), +.BR mount (8) +.SH AVAILABILITY +The findmnt command is part of the util-linux package and is available from +https://www.kernel.org/pub/linux/utils/util-linux/. |