Summery
対象サーバーにログインした最終日時を表示する。Construction
$ lastlog [options]
Option
-b, --before DAYS print only lastlog records older than DAYS
-h, --help display this help message and exit
-R, --root CHROOT_DIR directory to chroot into
-t, --time DAYS print only lastlog records more recent than DAYS
-u, --user LOGIN print lastlog record of the specified LOGIN
Sample
## user全て
$ lastlog
Username Port From Latest
root pts/1 localhost Sat Jan 30 11:05:04 +0900 2016
daemon **Never logged in**
bin **Never logged in**
sys **Never logged in**
sync **Never logged in**
games **Never logged in**
man **Never logged in**
lp **Never logged in**
mail **Never logged in**
news **Never logged in**
uucp **Never logged in**
proxy **Never logged in**
www-data pts/0 192.168.1.114 Sun Oct 23 06:41:45 +0900 2016
backup **Never logged in**
list **Never logged in**
irc **Never logged in**
gnats **Never logged in**
nobody **Never logged in**
systemd-timesync **Never logged in**
systemd-network **Never logged in**
systemd-resolve **Never logged in**
systemd-bus-proxy **Never logged in**
sshd **Never logged in**
mysql **Never logged in**
web pts/0 192.168.1.114 Sun Oct 23 06:41:45 +0900 2016
bind **Never logged in**
postfix **Never logged in**
ntp **Never logged in**
## ユーザー指定
$ lastlog -u root
Username Port From Latest
root pts/1 localhost Sat Jan 30 11:05:04 +0900 2016
Discription
LASTLOG(8) System Management Commands LASTLOG(8)
NAME
lastlog - reports the most recent login of all users or of a given user
SYNOPSIS
lastlog [options]
DESCRIPTION
lastlog formats and prints the contents of the last login log /var/log/lastlog file.
The login-name, port, and last login time will be printed. The default (no flags)
causes lastlog entries to be printed, sorted by their order in /etc/passwd.
OPTIONS
The options which apply to the lastlog command are:
-b, --before DAYS
Print only lastlog records older than DAYS.
-h, --help
Display help message and exit.
-R, --root CHROOT_DIR
Apply changes in the CHROOT_DIR directory and use the configuration files from
the CHROOT_DIR directory.
-t, --time DAYS
Print the lastlog records more recent than DAYS.
-u, --user LOGIN|RANGE
Print the lastlog record of the specified user(s).
The users can be specified by a login name, a numerical user ID, or a RANGE of
users. This RANGE of users can be specified with a min and max values
(UID_MIN-UID_MAX), a max value (-UID_MAX), or a min value (UID_MIN-).
If the user has never logged in the message ** Never logged in** will be displayed
instead of the port and time.
Only the entries for the current users of the system will be displayed. Other
entries may exist for users that were deleted previously.
NOTE
The lastlog file is a database which contains info on the last login of each user.
You should not rotate it. It is a sparse file, so its size on the disk is usually
much smaller than the one shown by "ls -l" (which can indicate a really big file if
you have in passwd users with a high UID). You can display its real size with "ls
-s".
FILES
/var/log/lastlog
Database times of previous user logins.
CAVEATS
Large gaps in UID numbers will cause the lastlog program to run longer with no
output to the screen (i.e. if in lastlog database there is no entries for users with
UID between 170 and 800 lastlog will appear to hang as it processes entries with
UIDs 171-799).
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