Question

how to tell this command history of a ssh session?

Asked by: areyouready344

I have three four ssh sessions running on my linux system and to know the command history for each ssh session, is this possible?

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Asked On
2009-09-17 at 14:35:25ID24741600
Tags

networking

,

Linux

,

RedHat

Topic

Linux Administration

Participating Experts
2
Points
500
Comments
6

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Answers

 

by: veedarPosted on 2009-09-17 at 16:18:59ID: 25362021

You can run the "history" command to see your shell history.

Or better take a look at the "script" command it captures all terminal activity.
http://blogs.koolwal.net/2009/01/14/howto-record-typescript-your-shellterminal-session-activites-in-linux/

 

by: areyouready344Posted on 2009-09-17 at 16:27:41ID: 25362069

Is there a way to see a history of a particular ssh session?

 

by: veedarPosted on 2009-09-17 at 17:20:18ID: 25362276

If you run the "script" command at the beginning of each ssh session it will save the command and command output history to a file.  

 

by: lanboyoPosted on 2009-09-17 at 19:29:08ID: 25362592

Your history or someone else's?  If you haven't set up process accounting on the box, you can only see when people logged in, not what they did. If you are root, you can pop into their home directory and check out their history file...

Here is some info on Process Accounting:

http://articles.techrepublic.com.com/5100-10878_11-1053377.html



 

 

by: areyouready344Posted on 2009-09-21 at 07:20:25ID: 25383100

lanboyo, my ssh history using the root username from the many ssh sessions.

 

by: lanboyoPosted on 2009-09-21 at 21:14:37ID: 25389443

If you want to see your previous commands run on currently existing sessions, you can run the history command.

history

Assuming you are using the bash shell...

The history command will show you the commands that you used in the current session, plus a number of commands from previous sessions, which number is controlled via the environment variables
HISTFILESIZE=500
HISTSIZE=500

Commands run longer than 500 command lines ago are lost. If you don't have access to the shells, that is the ssh sessions are completed or from unknown sources, you will have no way of telling what they have run until they log out, and at that point you have no way of differentiating thier commands from the different shells.

So if you have access to the shells, that is they are from your own box and can look in the window, run the command "history", every command after 500 will have been done in that interactive session.  If you do not, you can try to kill the sessions one at a time, and see if their commands get written to the history file.



 I like to add this to my .bashrc file so I have a more permanent record of my commands...

PROMPT_COMMAND='echo $(date +%Y.%m.%d-%H:%M:%S)\|$$\|$?\|$USER\|"$(history 1| cut -c8-10000)" >> ~/.bash_eternal_history'
HISTFILESIZE=2500
HISTSIZE=2500

export HISTSIZE
export HISTFILESIZE
export PROMPT_COMMAND

 

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