When I use grep to extract from status file using:
grep -ioP "vsim_nvclk_per_second.* " status
Output:
vsim_nvclk_per_second:float:27.2237552420673 |
vsim_post_munge_elapsed_s:float:16.1 |
But I just need
27.2237552420673
How do I change my regex ?
You can use
grep -ioP 'vsim_nvclk_per_second\D*\K\d[\d.]*' status
The vsim_nvclk_per_second\D*\K\d[\d.]* PCRE pattern (PCRE syntax is enabled with P option) matches
vsim_nvclk_per_second - a literal string\D* - any zer or more non-digit chars\K - match reset operator\d[\d.]* - a digit and then any zero or more digits or dots.See a PCRE regex demo.