sed & awk

Split the line with field separator ".", and restructuring again

awk -F. '/stbdbp/{ print $2"."$3"."$4"."$5".Z"}' ./list.txt

 

Insert "go" to the next of every lines from test_new.log

sed '1,$ {
        a\
go
}' test_new.log

 

Remove the line which contains "#" from test_new.log

sed '/#/d' test_new.log

 

Remove blank line from test_new.log

sed '/^[ ]*$/d' test_new.log