You're welcome. But note that not all users in the passwd file are really "people". i.e. on my Mac there are 65 entries in the passwd file, and there's only me and root (also me) in the vicinity
Special "users" like daemon, nobody, lpr, etc. are used by the system for various functions.
If you have any convention by which user ID's are assigned, you may want to count only those that match.
i.e. assuming that "real" user IDs start from 1000:
Code:
awk -F: '$3 >= 1000 { C++ } END { print C+0 }' /etc/passwd
Ok, another fun hiccup in my UNIX learning curve. I am trying to count the number of occurrences of an IP address across multiple files named example.hits. I can extract the number of occurrences from the files individually but when you use grep -c with multiple files you get the output similar to... (5 Replies)
Is it possible to count the number of users? or specifically emac users?
I know that you can count certain file sizes, like
find /usr/bin/ -size 11k -exec ls {} \;|wc -1
but how would I count users? (3 Replies)
Good afternoon! Im new at scripting and Im trying to write a script to
calculate total space, total used space and total free space in filesystem names matching a keyword (in this one we will use keyword virginia). Please dont be mean or harsh, like I said Im new and trying my best. Scripting... (4 Replies)
Hi All,
How to restrict the NIS users not to change their passwords in for NIS users??
and my NIS user is unable to login to at client location what could be the problem for this ?
Any body can help me. Thanks in advance. (1 Reply)
how to find out total number of users logged in a server from uptime . i mean to say i need the total output of unix command . who gives the out put at a particular time . I need at all time from which machine who has connected , (3 Replies)
hi,
i am new to shell scripts
i write a shell script to create multiple users but i need to give passwords to that users while creating users, command to write this script (1 Reply)
Hi All
I am trying to do ssh to different server and on the remote server for each user trying to get groups of that user but i am not getting the required
result.
ssh username@ip_address "for i in $( cat /etc/passwd| cut -d: -f1);do groups $i done;exit" >>abc.txt
only names are... (5 Replies)
Trying to count total files with different file types with thousands of files in each folder.
Since some files do not have extensions I have to use below criteria.
Count Total Files starting with --> "^ERROR"
Count Total Files starting with --> "^Runtime"
Count Everything else or files... (3 Replies)
Discussion started by: kchinnam
3 Replies
LEARN ABOUT LINUX
ac
AC(1) General Commands Manual AC(1)NAME
ac - print statistics about users' connect time
SYNOPSIS
ac [ -d | --daily-totals ] [ -y | --print-year ]
[ -p | --individual-totals ] [ people ]
[ -f | --file filename ] [ -a | --all-days ]
[ --complain ] [ --reboots ] [ --supplants ]
[ --timewarps ] [ --compatibility ]
[ --tw-leniency num ] [ --tw-suspicious num ]
[ -z | --print-zeros ] [ --debug ]
[ -V | --version ] [ -h | --help ]
DESCRIPTION
ac prints out a report of connect time (in hours) based on the logins/logouts in the current wtmp file. A total is also printed out.
The accounting file wtmp is maintained by init(8) and login(1). Neither ac nor login creates the wtmp if it doesn't exist, no accounting
is done. To begin accounting, create the file with a length of zero.
NOTE: The wtmp file can get really big, really fast. You might want to trim it every once and a while.
GNU ac works nearly the same u*x ac, though it's a little smarter in several ways. You should therefore expect differences in the output
of GNU ac and the output of ac's on other systems. Use the command info accounting to get additional information.
OPTIONS -d, --daily-totals
Print totals for each day rather than just one big total at the end. The output looks like this:
Jul 3 total 1.17
Jul 4 total 2.10
Jul 5 total 8.23
Jul 6 total 2.10
Jul 7 total 0.30
-p, --individual-totals
Print time totals for each user in addition to the usual everything-lumped-into-one value. It looks like:
bob 8.06
goff 0.60
maley 7.37
root 0.12
total 16.15
people Print out the sum total of the connect time used by all of the users included in people. Note that people is a space separated list
of valid user names; wildcards are not allowed.
-f, --file filename
Read from the file filename instead of the system's wtmp file.
--complain
When the wtmp file has a problem (a time-warp, missing record, or whatever), print out an appropriate error.
--reboots
Reboot records are NOT written at the time of a reboot, but when the system restarts; therefore, it is impossible to know exactly
when the reboot occurred. Users may have been logged into the system at the time of the reboot, and many ac's automatically count
the time between the login and the reboot record against the user (even though all of that time shouldn't be, perhaps, if the system
is down for a long time, for instance). If you want to count this time, include the flag. *For vanilla ac compatibility, include
this flag.*
--supplants
Sometimes, a logout record is not written for a specific terminal, so the time that the last user accrued cannot be calculated. If
you want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this you
want to include the time from the user's login to the next login on the terminal (though probably incorrect), include this flag.
*For vanilla ac compatibility, include this flag.*
--timewarps
Sometimes, entries in a wtmp file will suddenly jump back into the past without a clock change record occurring. It is impossible
to know how long a user was logged in when this occurs. If you want to count the time between the login and the time warp against
the user, include this flag. *For vanilla ac compatibility, include this flag.*
--compatibility
This is shorthand for typing out the three above options.
-a, --all-days
If we're printing daily totals, print a record for every day instead of skipping intervening days where there is no login activity.
Without this flag, time accrued during those intervening days gets listed under the next day where there is login activity.
--tw-leniency num
Set the time warp leniency to num seconds. Records in wtmp files might be slightly out of order (most notably when two logins occur
within a one-second period - the second one gets written first). By default, this value is set to 60. If the program notices this
problem, time is not assigned to users unless the --timewarps flag is used.
--tw-suspicious num
Set the time warp suspicious value to num seconds. If two records in the wtmp file are farther than this number of seconds apart,
there is a problem with the wtmp file (or your machine hasn't been used in a year). If the program notices this problem, time is
not assigned to users unless the --timewarps flag is used.
-y, --print-year
Print year when displaying dates.
-z, --print-zeros
If a total for any category (save the grand total) is zero, print it. The default is to suppress printing.
--debug
Print verbose internal information.
-V, --version
Print the version number of ac to standard output and quit.
-h, --help
Prints the usage string and default locations of system files to standard output and exits.
FILES
wtmp
The system wide login record file. See wtmp(5) for further details.
AUTHOR
The GNU accounting utilities were written by Noel Cragg <noel@gnu.ai.mit.edu>. The man page was adapted from the accounting texinfo page by
Susan Kleinmann <sgk@sgk.tiac.net>.
SEE ALSO login(1), wtmp(5), init(8), sa(8)
2010 August 16 AC(1)
04-13-2010
