lastb
show listing of last logged in users
see also :
shutdown - login - init
Synopsis
last
[-R] [-num] [
-n num ] [-adFiowx] [
-f file ] [ -t
YYYYMMDDHHMMSS ] [name...] [tty...]
lastb [-R] [-num] [
-n num ] [ -f file ]
[-adFiowx] [name...] [tty...]
add an example, a script, a trick and tips
examples
source
pkgdesc="Some tools from sysvinit (last,
lastb, wall, pidof)"
arch=('i686' 'x86_64')
url="http://savannah.nongnu.org/projects/sysvinit"
for manpage in ${_progs} ${_sbin_progs} lastb
pidof; do
section=$(ls $manpage.* | sed "s@[^\.]*\.@@")
install -m644 $manpage.* $pkgdir/usr/share/man/man${section}
description
Last
searches back through the file /var/log/wtmp (or the
file designated by the -f flag) and displays a
list of all users logged in (and out) since that file was
created. Names of users and tty’s can be given, in
which case last will show only those entries matching
the arguments. Names of ttys can be abbreviated, thus
last 0 is the same as last tty0.
When
last catches a SIGINT signal
(generated by the interrupt key, usually control-C) or a
SIGQUIT signal (generated by the quit key,
usually control-\), 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 reboots since the
log file was created.
Lastb is
the same as last, except that by default it shows a
log of the file /var/log/btmp, which contains all the
bad login attempts.
options
-f
file
Tells last to use a
specific file instead of /var/log/wtmp.
-num
This is a count telling last how many lines to
show.
-n num
The same.
-t
YYYYMMDDHHMMSS
Display the state of logins as
of the specified time. This is useful, e.g., to determine
easily who was logged in at a particular time -- specify
that time with -t and look for "still
logged in".
-R
Suppresses the display of the hostname field.
-a
Display the hostname in the last column. Useful in
combination with the next flag.
-d
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
Print full login and logout times and dates.
-i
This option is like -d in that it displays the IP
number of the remote host, but it displays the IP number in
numbers-and-dots notation.
-o
Read an old-type wtmp file (written by linux-libc5
applications).
-w
Display full user and domain names in the output.
-x
Display the system shutdown entries and run level
changes.
files
/var/log/wtmp
/var/log/btmp
notes
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 /var/log/wtmp).
see also
shutdown ,
login , init
author
Miquel van
Smoorenburg, miquels[:at:]cistron[:dot:]nl