cat a.txt
a.b.c.d.e.google.com
x.y.z.google.com
rev a.txt | awk -F. '{print $2,$3}' | rev
This is showing:
e google
x google
But I want this output
a.b.c.d.e.google
b.c.d.e.google
c.d.e.google
e.google
x.y.z.google
y.z.google
z.google
Thank You in Advance
With your shown samples, please try following awk code. Written and tested in GNU awk should work in any awk.
awk '
BEGIN{
FS=OFS="."
}
{
nf=NF
for(i=1;i<(nf-1);i++){
print
$1=""
sub(/^[[:space:]]*\./,"")
}
}
' Input_file
Here is one more awk solution:
awk -F. '{while (!/^[^.]+\.[^.]+$/) {print; sub(/^[^.]+\./, "")}}' file
a.b.c.d.e.google.com
b.c.d.e.google.com
c.d.e.google.com
d.e.google.com
e.google.com
x.y.z.google.com
y.z.google.com
z.google.com
Using sed
$ sed -n '/^/p;:a;s/[a-z]*\.\(.*[a-z]\.[a-z]*\.[a-z]*\)/\1/p;ta;' input_file
a.b.c.d.e.google.com
b.c.d.e.google.com
c.d.e.google.com
d.e.google.com
e.google.com
x.y.z.google.com
y.z.google.com
z.google.com