AIX

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hi Paul

I'm curious to know how do you know/extract the value of year from wtmp entries. When i run last command it doesn't show which year the entries are from only day and month.

With Regards

Albert M.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hi Paul

I'm curious to know how do you know/extract the value of year from wtmp entries. When i run last command it doesn't show which year the entries are from only day and month.

With Regards

Albert M.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

I think "man fwtmp" might come handy here.

Hi Paul

I'm curious to know how do you know/extract the value of year from wtmp entries. When i run last command it doesn't show which year the entries are from only day and month.

With Regards

Albert M.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hi Paul

I'm curious to know how do you know/extract the value of year from wtmp entries. When i run last command it doesn't show which year the entries are from only day and month.

With Regards

Albert M.

Hello Paul,

I think you searching for something like the last command on AIX.

With this simple command you can query on specific time stamp who was logged in at that time.

See example below for Year 2024 Jan 25 8:00 hour:

last -t 202401250800 

user1   pts/1        10.210.152.221         Jan 25 07:47 - 08:32  (00:45)

user3   pts/6        10.212.141.56          Jan 22 10:26   still logged in.

user2   pts/4        10.212.141.56          Jan 22 09:57   still logged in.

wtmp begins     Jan 15 13:35

It also shows at the last line since when the wtmp is recording, in other words when it was cleared for the time.

Just let me know if this is the answer you're looking for.

Greetings Christian Sonnemans.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Interesting question.

• Not clear on why you want too know this number as most AIX servers do not allow users to log in at all.
• AIX servers are accessed via the services the server provides over the network.
• I guess system administrators log in directly.
• Tracking online users would let you "see" if sysadmin people are leaving sessions connected or might highlight hacking activity.

To see the number of currently logged in the uptime command (or API) is useful.

Both njmon for AIX and njmon for Linux record the number of users in the uptime measure.

These would allow instant graphing over time, if you have the data in InfluxDB and use Grafana - or alternative tools.

If you are already using njmon/nimon and a database then you can go look at the data today and the stat in history.

If you want to implement the following then you will only see the stats from the moment you implement i.e. no history.

nmon for Linux does not save the users count - I will add uptime user count in the next upgrade.

If someone wants to try and test this urgently, let me know and "hack" the code ASAP.

Down stream graphing tools (like nmonchart), would need minor changes to graph the user stats

nmon for AIX does not have users counter and is harder to upgrade - sorry but I don't have access to AIX at the moment.
You would have to request this additional feature using the RFE to IBM and it might arrive in next years AIX releases.

nmon does allow users to add extra stats via the the nmon external data collector function.
Would take an hour or two to implement (for a competent AIX systems administrator) and then start rolling out the new feature.

See https://www.ibm.com/support/pages/nmon-and-external-data-collectors

All the above would allow collecting stats

Hope this helps, @mr_nmon

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Are you positive that you want %k instead of %H ?

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.

Are you positive that you want %k instead of %H ?

Note that here "concurrent" is "logged in at the same time", not "working at the same time", so management's usual linear approach may backfire spectacularly if the amount of work per user times time unit is significantly higher for the new users than for the previous ones.

AIX doesn't keep that metric.  If you need it, you must collect the output of "who|wc -l" at set intervals.

On the other hand, you might be facing an X/Y problem, what is the intended use of this metric ?

Hi,  is there a way to log and or view the history of the maximum number of concurrent authenticated user logins in AIX?

A Google search did not return anything useful.