View login related logs

tail -f /var/log/securevi /var/log/securegrep 'something' /var/log/secure

 [root@hc168 ~]# tail -f /var/log/secureNov 16 15:28:56 hc168 sshd[28137]: Accepted password for yaobin from ::ffff:222.218.124.37 port 1273 ssh2Nov 16 08:06:57 hc168 sshd[28945]: Accepted password for yaobin from ::ffff:202.103.221.74 port 1267 ssh2Nov 16 16:06:57 hc168 sshd[28944]: Accepted password for yaobin from ::ffff:202.103.221.74 port 1267 ssh2Nov 16 16:11:00 hc168 sshd[2942]...