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Monday, May 7, 2012

Help with unix commands for user logins

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1. The problem statement, all variables and given/known data:



List the last 3 times you logged into the hottub and the command(s) you used to obtain this information





2. Relevant commands, code, scripts, algorithms:







3. The attempts at a solution (include all code and scripts):

1) last agreen1 |head -n 3

2) tail -n 100 messages|grep agreen1





4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):



University of Illinois, O'Reilly School of Technology, Kelly Hoover, Linux/Unix 1: The Unix file system





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So basically I telnet into a server called cold1 then ssh into a server called hottub, and then into one called bubble. I have root privilege in my bubble.



When i use the "last" command I was told that it only shows me where I have come from not where I am. If Im logged into the bubble it will show me my hottub logins. If Im on huttub it will show me my cold1 logins. So thats not the way.



So I logged into the hottub server and used cd /var/log to get to the log diectory. Then used the above command: tail -n 100 messages|grep agreen1.



This what my instructor said about my failed attempt: "You have the idea however we have a simpler command with a simpler output, that just shows logins and can specify only the last 3 logins.



Thanks for your help.

Al green




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