Most log files have dates and times in monotonically non-decreasing order. Yours does not.
Most log files have timestamps in a consistent format. Yours does not.
Assuming that comma and space are field delimiters, is the date field on lines that contain dates always field 9?
Since timestamps aren't in order, how are we supposed to guess what date should apply to a line that does not have a date?
What is supposed to happen to log file lines that do not have a date or timestamp?
What output are you hoping to produce for the sample input you provided?
Hello All,
I'm generating timestamps (file creation timestamps) for all the files in a directory. I need to compare all the timestamps.
for example if i have 4 files and their timestamps are 20091125114556,
20091125114556,20091125114556,20091125114556 respectively.
I need to differentiate... (1 Reply)
Hello All,
I'm generating timestamps (file creation timestamps) for all the files in a directory. I need to compare all the timestamps.
for example if i have 4 files and their timestamps are 20091125114556,
20091125114556,20091125114556,20091125114556 respectively.
I need to differentiate... (9 Replies)
Hi, i am a general user of linux but we work mostly on windows next i am moving full time on linux.
here is my question:
We have product which consist or several subsystem each subsystem has one module to create logs file dump. and i am going to write that support dump tool.
we need to... (3 Replies)
Hi Friends,
I have 2 varaibles which contain
START=`date '+ %m/%d/%y %H:%M:%S'`
END=`date '+ %m/%d/%y %H:%M:%S'`
i want the time difference between the two variables in Seconds.
Plz help. (2 Replies)
I'm looking for a way to have the "date" command output the date in a specific format.
I'm not familiar with the different ways to use the date command at all. i read up on it, but i dont get how to manipulate it.
i know that i can get the date format to give me a format like:
2012-10-13... (6 Replies)
Hi Gents.
Please can you help me to solve a problem.
I have a long list of files, which I need to change the time stamp.
-r--r--r-- 1 geo2 geovect 47096216 Feb 8 10:40 00000009.segd
-r--r--r-- 1 geo2 geovect 47096216 Feb 8 10:40 00000010.segd
-r--r--r-- 1 geo2 geovect 47096216 Feb ... (11 Replies)
Hi,
I have been working on the error Log script, where errors are pulled from server.
I need to pull the data of the error logs between two dates & time, for example :
22/12/2014 20:00:00
22/12/2014 22:00:00
Whatever error have came during this duration.
Now the question is the record... (6 Replies)
I've installed cygwin_openssh on Windows 2012 R2 and it's working great. My issue is when a file is uploaded say from a different timezone, when it is uploaded, it doesnt pick up the sftp servers time.. Is there a way to fix that?
i.e. When someone in PST uploads a file to this server in EST,... (0 Replies)
Hi,
I need help on syslog-ng on RHEL 7.2. It is working as expected.
As per configuration, it is supposed to create authlog, messages and xymessages daily in respective folder of date. But I can see only messages file and that is also not updating well.
# ps -ef | grep -i syslog
root 22954... (1 Reply)
Discussion started by: solaris_1977
1 Replies
LEARN ABOUT DEBIAN
lastb
LAST, LASTB(1) User Commands LAST, LASTB(1)NAME
last, lastb - show a listing of last logged in users
SYNOPSIS
last [options] [username...] [tty...]
lastb [options] [username...] [tty...]
DESCRIPTION
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.
OPTIONS -a, --hostlast
Display the hostname in the last column. Useful in combination with the --dns option.
-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.
-number
-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.
TIME FORMATS
The options that take the time argument understand the following formats:
YYYYMMDDhhmmss
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)
now
yesterday (time is set to 00:00:00)
today (time is set to 00:00:00)
tomorrow (time is set to 00:00:00)
+5min
-5days
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 configu-
ration 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).
FILES
/var/log/wtmp
/var/log/btmp
AUTHOR
Miquel van Smoorenburg <miquels@cistron.nl>
AVAILABILITY
The last command is part of the util-linux package and is available from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-
linux/>.
SEE ALSO login(1), wtmp(5), init(8), shutdown(8)util-linux October 2013 LAST, LASTB(1)