Help, awk sed sort

Shell Programming and Scripting
1

Hi,everyone:
I'm new to shell, and now get trouble with some script:

line=`/usr/xpg4/bin/awk '/^([^\|]*\|){2}'"$CR"'/ {print $0}' ${TIER4FILE}|grep -v 
 
OSNAME=`sed -n ''$LINE'p' $DATALOC/os`
 
sort +1 /tmp/LhasaCRs2 > /tmp/LhasaCRs1

I cannot understand the "{2}" here. My mentor said it meant the second domain, but I tried and I don't think so.

In the second line, I cannot figure out the exact meaning of the script.

In the last line, I searched that "+" is the domain number, but I cannot run "sort" with "+" on my system like that.
Could anybody help? Thanks a lot.

2

The second line in your code is for printing the "$LINE"th line of the file $DATALOC/os

Check man pages of "sort". for more information on usage of it.