OnWorks favicon

lastb - Online in the Cloud

Run lastb in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command lastb that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



last, lastb - show a listing of last logged in users


last [options] [username...] [tty...]
lastb [options] [username...] [tty...]


last searches back through the /var/log/wtmp file (or the file designated by the -f
option) and displays a list of all users logged in (and out) since that file was created.
One or more usernames and/or ttys can be given, in which case last will show only the
entries matching those arguments. Names of ttys can be abbreviated, thus last 0 is the
same as last tty0.

When catching a SIGINT signal (generated by the interrupt key, usually control-C) or a
SIGQUIT signal, last will show how far it has searched through the file; in the case of
the SIGINT signal last will then terminate.

The pseudo user reboot logs in each time the system is rebooted. Thus last reboot will
show a log of all the reboots since the log file was created.

lastb is the same as last, except that by default it shows a log of the /var/log/btmp
file, which contains all the bad login attempts.


-a, --hostlast
Display the hostname in the last column. Useful in combination with the --dns

-d, --dns
For non-local logins, Linux stores not only the host name of the remote host, but
its IP number as well. This option translates the IP number back into a hostname.

-f, --file file
Tell last to use a specific file instead of /var/log/wtmp. The --file option can
be given multiple times, and all of the specified files will be processed.

-F, --fulltimes
Print full login and logout times and dates.

-i, --ip
Like --dns , but displays the host's IP number instead of the name.

-n, --limit number
Tell last how many lines to show.

-p, --present time
Display the users who were present at the specified time. This is like using the
options --since and --until together with the same time.

-R, --nohostname
Suppresses the display of the hostname field.

-s, --since time
Display the state of logins since the specified time. This is useful, e.g., to
easily determine who was logged in at a particular time. The option is often
combined with --until.

-t, --until time
Display the state of logins until the specified time.

--time-format format
Define the output timestamp format to be one of notime, short, full, or iso. The
notime variant will not print any timestamps at all, short is the default, and full
is the same as the --fulltimes option. The iso variant will display the timestamp
in ISO-8601 format. The ISO format contains timezone information, making it
preferable when printouts are investigated outside of the system.

-w, --fullnames
Display full user names and domain names in the output.

-x, --system
Display the system shutdown entries and run level changes.


The options that take the time argument understand the following formats:

YYYY-MM-DD hh:mm:ss
YYYY-MM-DD hh:mm (seconds will be set to 00)
YYYY-MM-DD (time will be set to 00:00:00)
hh:mm:ss (date will be set to today)
hh:mm (date will be set to today, seconds to 00)
yesterday (time is set to 00:00:00)
today (time is set to 00:00:00)
tomorrow (time is set to 00:00:00)


The files wtmp and btmp might not be found. The system only logs information in these
files if they are present. This is a local configuration issue. If you want the files to
be used, they can be created with a simple touch(1) command (for example, touch

Use lastb online using onworks.net services

Free Servers & Workstations

Download Windows & Linux apps

  • 1
    LMMS Digital Audio Workstation
    LMMS Digital Audio Workstation
    LMMS is a free cross-platform software
    which allows you to produce music with
    your computer. If you like this project
    consider getting involved in the project
    Download LMMS Digital Audio Workstation
  • 2
    FreeRTOS Real Time Kernel (RTOS)
    FreeRTOS Real Time Kernel (RTOS)
    FreeRTOS is a market-leading real-time
    operating system (RTOS) for
    microcontrollers and small
    microprocessors. Distributed freely
    under the MIT open source lice...
    Download FreeRTOS Real Time Kernel (RTOS)
  • 3
    Avogadro is an advanced molecular
    editor designed for cross-platform use
    in computational chemistry, molecular
    modeling, bioinformatics, materials
    science and ...
    Download Avogadro
  • 4
    XMLTV is a set of programs to process
    TV (tvguide) listings and help manage
    your TV viewing, storing listings in an
    XML-based format. There are utilities to
    Download XMLTV
  • 5
    Strikr Free Software project. Artifacts
    released under a 'intent based'
    dual license: AGPLv3 (community) and
    CC-BY-NC-ND 4.0 international
    Download strikr
  • 7
    giflib is a library for reading and
    writing gif images. It is API and ABI
    compatible with libungif which was in
    wide use while the LZW compression
    algorithm was...
    Download GIFLIB
  • More »

Linux commands