Last log ssh login command in Linux

lastlog  

user1              pts/1    183.88.xx.xx    Mon Apr 25 21:35:36 +0700 2011 

user2                                       **Never logged in** 

user3                                  **Never logged in** 

last 

root     pts/0        10.114.xx.xx   Fri Apr  8 16:08 - 16:30  (00:22) 

user     pts/0        10.114.xx.xx   Thu Apr  7 10:48 - 11:47  (00:59) 

user     pts/0        10.114.xx.xx   Thu Apr  7 10:43 - 10:47  (00:04) 

user     pts/0        10.114.xx.xx   Thu Apr  7 10:22 - 10:42  (00:20) 

root     pts/0        10.114.xx.xx   Thu Apr  7 09:43 - 10:21  (00:38) 

root     pts/1        10.114.xx.xx    Wed Mar 30 15:49 - 15:50  (00:00)

• แถม

last -n 4 username

lastb 

Refer

• http://linux.about.com/library/cmd/blcmdl8_lastlog.htm
• How to clear last log >> http://www.cyberciti.biz/faq/howto-display-clear-last-login-information/
• http://www.linuxjournal.com/article/4851
• http://www.3spoken.co.uk/2010/10/resetting-lastlog-file-in-linux.html
• http://www.experts-exchange.com/OS/Unix/Q_24205211.html
• http://www.linuxforums.org/forum/programming-scripting/142931-how-do-i-log-ssh-activity.html