How to remove .000 from 1000.000 using grep command?

[rameshjumgam]

Hi in my file im having value like
cpu speed is 1000.000

but i wants to pick only before special character .(dot) please help me someone ? thanks in advance

[sicarie]

Sounds like you need a regex (regular expression).

Are you familiar with the command-line utilities awk or sed? Or possibly a scripting language like PERL or Python?

Those all offer regular expression functionality and PERL and Python are usually contained in most base installs (awk and sed are almost always in command-line utilities).

From there, I'd suggest something with a group. Groups are usually noted through parentheses - what you set to catch in between the parentheses will be caught. You could do (1000) in your script to test, and then catch something like ([0-9]+)\.

If I remember my regexes correctly, that will capture any group of numbers before a period (a dot is a special character in a regex and needs to be 'escaped' to catch the dot symbol).

Here are some links that might help
awk - http://www.gnu.org/software/gawk/manual/gawk.html
sed - http://www.gnu.org/software/sed/
PERL - http://www.perl.org/docs.html
Python - http://www.python.org/doc/