How to extract a variable length substring using ksh
With pure bash's parameter expansion capability.
var="SID_LIST_ORADBPOC1LSN =" ##Creating shell variable here.temp1="${var##*_}" ##Removing everything till _ ## for longest match here.echo "${temp1/ =/}" ##Substituting space = with null here.ORADBPOC1LSNI am printing value of temp1's parameter expansion, you could save this into variable too as per your need.
OR if you want to do it in a single awk or so then try:
echo "$var" | awk -F'_| ' '{print $3}'