Display matched string to end of line

Question

How to find a particular string in a file and display matched string and rest of the line?

For example- I have a line in a.txt:

This code gives ORA-12345 in my code.

So, I am finding string 'ORA-'

Output Should be:

ORA-12345 in my code

Tried using grep:

grep 'ORA-*' a.txt

but it gives whole line in the output.

Answer 1

# Create test data:
echo "junk ORA-12345 more stuff" > a.tst
echo "junk ORB-12345 another stuff" >> a.tst
# Actually command:
# the -o (--only-matching) flag will print only the matched result, and not the full line
cat a.tst | grep -o 'ORA-.*$' # ORA-12345 more stuff

As fedorqui pointed out you can use:

grep -o 'ORA-.*$' a.tst