The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
vhostmd_selinux – Security Enhanced Linux Policy for the vhostmd processes Description Security-Enhanced Linux secures the vhostmd processes via flexible mandatory access control. The vhostmd processes execute with the vhostmd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
vhostmd – A metrics gathering daemon. Synopsis vhostmd [ OPTION ] Description vhostmd provides a "metrics communication channel" between a host and its hosted virtual machines, allowing limited introspection of host resource usage from within virtual machines. This functionality may be useful in hosting environments, giving virtual machine administrators a limited view of host resource…
vgsplit – Move physical volumes into a new or existing volume group Synopsis vgsplit option_args position_args [ option_args ] Description vgsplit moves one or more PVs from a source VG to a destination VG. The PVs can be specified explicitly or implicitly by naming an LV, in which case on PVs underlying the LV are moved. If…
vgscan – Search for all volume groups Synopsis vgscan [ option_args ] Description vgscan scans all supported LVM block devices in the system for VGs. Usage vgscan [ –ignorelockingfailure ] [ –mknodes ] [ –notifydbus ] [ –reportformat basic|json ] [ COMMON_OPTIONS ] Common options for lvm: [ -d|–debug ] [ -h|–help ] [ -q|–quiet ] […
vgs – Display information about volume groups Synopsis vgs [ option_args ] [ position_args ] Description vgs produces formatted output about VGs. Usage vgs [ -a|–all ] [ -o|–options String ] [ -S|–select String ] [ -O|–sort String ] [ –aligned ] [ –binary ] [ –configreport log|vg|lv|pv|pvseg|seg ] [ –foreign ] [ –ignorelockingfailure ] [ –logonly ] […
vgrename – Rename a volume group Synopsis vgrename position_args [ option_args ] Description vgrename renames a VG. All VGs visible to a system need to have different names, otherwise many LVM commands will refuse to run or give warning messages. VGs with the same name can occur when disks are moved between machines, or filters are changed….
vgremove – Remove volume group(s) Synopsis vgremove position_args [ option_args ] Description vgremove removes one or more VGs. If LVs exist in the VG, a prompt is used to confirm LV removal. If one or more PVs in the VG are lost, consider vgreduce –removemissing to make the VG metadata consistent again. Repeat the force option (-ff)…
vgreduce – Remove physical volume(s) from a volume group Synopsis vgreduce option_args position_args [ option_args ] -a|–all -A|–autobackup y|n –commandprofile String –config String -d|–debug –driverloaded y|n -f|–force -h|–help –lockopt String –longhelp –mirrorsonly –nolocking –profile String -q|–quiet –removemissing –reportformat basic|json -t|–test -v|–verbose –version -y|–yes Description vgreduce removes one or more unused PVs from a VG. Usage Remove a PV from a VG. vgreduce VG PV…
vgmknodes – Create the special files for volume group devices in /dev Synopsis vgmknodes [ option_args ] [ position_args ] Description vgmknodes checks the LVM device nodes in /dev that are needed for active LVs and creates any that are missing and removes unused ones. This command should not usually be needed if all the system components are interoperating…
vgmerge – Merge volume groups Synopsis vgmerge position_args [ option_args ] Description vgmerge merges two existing VGs. The inactive source VG is merged into the destination VG if physical extent sizes are equal and PV and LV summaries of both VGs fit into the destination VG’s limits. Usage vgmerge VG VG [ -A|–autobackup y|n ] [ -l|–list…
vgimportclone – Import a VG from cloned PVs Synopsis vgimportclone position_args [ option_args ] Description vgimportclone imports a VG from duplicated PVs, e.g. created by a hardware snapshot of existing PVs. A duplicated VG cannot used until it is made to coexist with the original VG. vgimportclone renames the VG associated with the specified PVs and changes…
vgimport – Register exported volume group with system Synopsis vgimport option_args position_args [ option_args ] Description vgimport makes exported VGs known to the system again, perhaps after moving the PVs from a different system. vgexport clears the VG system ID, and vgimport sets the VG system ID to match the host running vgimport (if the host has…
vgextend – Add physical volumes to a volume group Synopsis vgextend position_args [ option_args ] Description vgextend adds one or more PVs to a VG. This increases the space available for LVs in the VG. Also, PVs that have gone missing and then returned, e.g. due to a transient device failure, can be added back to the…
vgexport – Unregister volume group(s) from the system Synopsis vgexport option_args position_args [ option_args ] Description vgexport changes a VG into the exported state, which ensures that the VG and its disks are not being used, and cannot be used until the VG is imported by vgimport(8). Putting a VG into an unusable, offline state can be…
vgetty – voice extension to the mgetty+sendfax program Synopsis vgetty [options] ttydevice vgetty is not meant to be run from the command line. Systems with SysV initscripts should start vgetty from the /etc/inittab file so it can respawn after each call. Here is a typical inittab entry: S0:345:respawn:/usr/local/sbin/vgetty ttyS0 If you already have a line…
vgdisplay – Display volume group information Synopsis vgdisplay [ option_args ] [ position_args ] Description vgdisplay shows the attributes of VGs, and the associated PVs and LVs. vgs(8) is a preferred alternative that shows the same information and more, using a more compact and configurable output format. Usage vgdisplay [ -A|–activevolumegroups ] [ -c|–colon ] [ -C|–columns ] […
vgcreate – Create a volume group Synopsis vgcreate position_args [ option_args ] Description vgcreate creates a new VG on block devices. If the devices were not previously intialized as PVs with pvcreate(8), vgcreate will inititialize them, making them PVs. The pvcreate options for initializing devices are also available with vgcreate. When vgcreate uses an existing PV, that…
vgconvert – Change volume group metadata format Synopsis vgconvert position_args [ option_args ] Description vgconvert is no longer a part of LVM. It was removed along with support for the LVM1 format. Use an older version of LVM to convert VGs from the LVM1 format to LVM2. Usage vgconvert VG … [ -f|–force ] [ -M|–metadatatype lvm2…
vgck – Check the consistency of volume group(s) Synopsis vgck option_args position_args [ option_args ] [ position_args ] Description vgck checks LVM metadata for consistency. Usage Read and display information about a VG. vgck [ –reportformat basic|json ] [ COMMON_OPTIONS ] [ VG|Tag … ] Rewrite VG metadata to correct problems. vgck –updatemetadata VG [ COMMON_OPTIONS ] Common options…
vgchange – Change volume group attributes Synopsis vgchange option_args position_args [ option_args ] [ position_args ] -a|–activate y|n|ay –activationmode partial|degraded|complete –addtag Tag –alloc contiguous|cling|cling_by_tags|normal|anywhere|inherit -A|–autobackup y|n –commandprofile String –config String -d|–debug –deltag Tag –detachprofile –driverloaded y|n -f|–force -h|–help -K|–ignoreactivationskip –ignorelockingfailure –ignoremonitoring –lockopt String –lockstart –lockstop –locktype sanlock|dlm|none -l|–logicalvolume Number –longhelp -p|–maxphysicalvolumes Number –metadataprofile String –monitor y|n –nolocking –noudevsync -P|–partial -s|–physicalextentsize Size[m|UNIT] –poll y|n –profile String –pvmetadatacopies 0|1|2 -q|–quiet –readonly –refresh –reportformat basic|json -x|–resizeable y|n -S|–select String –sysinit –systemid String -t|–test -u|–uuid -v|–verbose…