Shell Programming and Scripting

hello=value some text
hello=string diff text



In the above given text in a file I want to replace hello=<something> with hello=hi,Like the one given below

hello=hi some text
hello=hi diff text

I am finding hard to get a solution since the hello=<something> can carry any pattern like hello=1,hello=text,hello=press and evertyihg shoud be repelaced as hello=hi

Code:

sed 's/^hello=\([^ ]*\)\(.*\)/hello=hi\2/' inputFile

OR

Code:

awk '{if(index($1,"hello=")==1) $1="hello=hi";print}' inputFile

Perl solution

Code:

perl -nle 's/^(hello=)(.+?)\s/\1hi /g;print $_;' inputfile