{Q} how to setup sftp log

[Anaya, Michael]

We just migrate out UNIX system to Redhat LINUX system
(AS 3.6).  I tried to find who use "sftp"
login to my server.  on SUN or AIX server I can use:

    last|grep ftp

This commanf does NOT show anything on LINUX.  

Can anyone tell me :

1. where is log file for sftp or how to setup  sftp
log file?

2. any command similiar to "last" which can check
"sftp" login?

Thanks.
 

sudo last -f /var/log/secure
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