Предположим, понадобилось почитать какой-нибудь help:
user:~$ lvm --help
WARNING: Running as a non-root user. Functionality may be unavailable.
Available lvm commands:
Use 'lvm help <command>' for more information
config Display and manipulate configuration information
devtypes Display recognised built-in block device types
dumpconfig Display and manipulate configuration information
formats List available metadata formats
fullreport Display full report
help Display help for commands
lastlog Display last command's log report
lvchange Change the attributes of logical volume(s)
lvconvert Change logical volume layout
lvcreate Create a logical volume
lvdisplay Display information about a logical volume
lvextend Add space to a logical volume
lvmchange With the device mapper, this is obsolete and does nothing.
lvmconfig Display and manipulate configuration information
lvmdevices Manage the devices file
lvmdiskscan List devices that may be used as physical volumes
lvmsadc Collect activity data
lvmsar Create activity report
lvpoll Continue already initiated poll operation on a logical volume
lvreduce Reduce the size of a logical volume
lvremove Remove logical volume(s) from the system
lvrename Rename a logical volume
lvresize Resize a logical volume
lvs Display information about logical volumes
lvscan List all logical volumes in all volume groups
pvchange Change attributes of physical volume(s)
pvck Check metadata on physical volumes
pvcreate Initialize physical volume(s) for use by LVM
pvdata Display the on-disk metadata for physical volume(s)
pvdisplay Display various attributes of physical volume(s)
pvmove Move extents from one physical volume to another
pvremove Remove LVM label(s) from physical volume(s)
pvresize Resize physical volume(s)
pvs Display information about physical volumes
pvscan List all physical volumes
segtypes List available segment types
systemid Display the system ID, if any, currently set on this host
tags List tags defined on this host
version Display software and driver version information
vgcfgbackup Backup volume group configuration(s)
vgcfgrestore Restore volume group configuration
vgchange Change volume group attributes
vgck Check the consistency of volume group(s)
vgconvert Change volume group metadata format
vgcreate Create a volume group
vgdisplay Display volume group information
vgexport Unregister volume group(s) from the system
vgextend Add physical volumes to a volume group
vgimport Register exported volume group with system
vgimportclone Import a VG from cloned PVs
vgimportdevices Add devices for a VG to the devices file.
vgmerge Merge volume groups
vgmknodes Create the special files for volume group devices in /dev
vgreduce Remove physical volume(s) from a volume group
vgremove Remove volume group(s)
vgrename Rename a volume group
vgs Display information about volume groups
vgscan Search for all volume groups
vgsplit Move physical volumes into a new or existing volume group
user:~$
Это полный вывод. А теперь что-нибудь из systemd:
user:~$ systemd-analyze --help
systemd-analyze [OPTIONS...] COMMAND ...
Profile systemd, show unit dependencies, check unit files.
Commands:
[time] Print time required to boot the machine
blame Print list of running units ordered by
time to init
critical-chain [UNIT...] Print a tree of the time critical chain
of units
plot Output SVG graphic showing service
initialization
dot [UNIT...] Output dependency graph in dot(1) format
dump Output state serialization of service
manager
cat-config Show configuration file and drop-ins
unit-files List files and symlinks for units
unit-paths List load directories for units
exit-status [STATUS...] List exit status definitions
capability [CAP...] List capability definitions
syscall-filter [NAME...] List syscalls in seccomp filters
filesystems [NAME...] List known filesystems
condition CONDITION... Evaluate conditions and asserts
verify FILE... Check unit files for correctness
calendar SPEC... Validate repetitive calendar time
events
timestamp TIMESTAMP... Validate a timestamp
timespan SPAN... Validate a time span
security [UNIT...] Analyze security of unit
inspect-elf FILE... Parse and print ELF package metadata
Options:
--recursive-errors=MODE Control which units are verified
lines 1-33
Теперь мне нужно проскролить через клавиатуру, потому что колесико мышки заработает только после того как я проскролю клавиатурой… Что мешает сразу весь вывод дать? Можно это как-то поменять?
