How to print from the field separator ":" until end of the line?

Question

How to print from the field separator ":" until end of the line

example:

echo " llap_java_opts  :  -XX:+AlwaysPreTouch {% if java_version > 7 %}-XX:+UseG1GC -XX:TLABSize=8m -XX:+ResizeTLAB -XX:+UseNUMA -XX:+AggressiveOpts"

llap_java_opts  :  -XX:+AlwaysPreTouch {% if java_version > 7 %}-XX:+UseG1GC -XX:TLABSize=8m -XX:+ResizeTLAB -XX:+UseNUMA -XX:+AggressiveOpts

expected output:

-XX:+AlwaysPreTouch {% if java_version > 7 %}-XX:+UseG1GC -XX:TLABSize=8m -XX:+ResizeTLAB -XX:+UseNUMA -XX:+AggressiveOpts

Answer 1

I would use cut -d: -f2- for this:

echo " llap_java_opts  :  -XX:+AlwaysPreTouch {% if java_version > 7 %}-XX:+UseG1GC -XX:TLABSize=8m -XX:+ResizeTLAB -XX:+UseNUMA -XX:+AggressiveOpts" | cut -d: -f2-

Answer 2

Pass it through

sed 's/^[^:]*: *//'

This sed substitution will delete everything from the beginning of the line up to and including the first : and any spaces after it.

If you have the string in a shell variable $a then

printf -- '-%s\n' "${a#*-}"

This uses the parameter expansion ${parameter#word} to delete everything up to and including the first -. The dash is inserted again by the printf. This does not use any external utilities when run in most modern shells.

Answer 3

Using grep:

grep -Po ':\K.*' infile

the \K assertion will ignore to printing everything before and first colon : seen.