linux中的last命令在第3列显示`：0`，这是什么意思？

Question

I want to write a shell script sort out the data that last command shows. I got this in my server.

 root    pts/0        10.168.136.175     Wed Sep 14 14:24 - 14:54   (00:29)        
 root    :0                              Mon Sep 12 10:34 - 11:00   (00:25)       
 reboot  system boot  2.6.18-308.el5PA   Sun Sep 11 11:31           (86+03:05)

I did some search, there are some saying :0.0 in the 3rd column means login locally, second column means what kind of terminal been use, like pts and tty .

But what does the :0 in line 2 second column in my log?
I am using redhat 6.5.

Answer 1

It means local computer. Generally each session represented by pairs ip_address:display_number . When you logged in locally the IP address is omitted. That's why there is nothing before : . Display number is actually the session number from the specified IP address. So, 0 means the first session