linux 中的 awk 命令中的 {} 有什么用？

Question

I ran below command on Linux terminal, it works, just interested in knowing how {} works? example:-

who | awk '{ if($1 == "name") {print}}' 

Answer 1

Programs in awk are composed of statements of the form:

pattern { action }

so the stuff in the {} is an action to be carried out, when filtering the text that awk is processing

See https://www.gnu.org/software/gawk/manual/gawk.html for a full guide to the GNU version of awk that is found on most Linux systems