In Linux, how does one remove the @ attribute of a file? in linux, how does one remove the attribute?

In Linux, how does one remove the @ attribute of a file? in linux, how does one remove the attribute?

I copied a memcached. so file from another place a few days ago and found that it could not run. I used ls-l to check that memcached. so has an additional @ attribute. How can I remove this @ attribute?

Step 1: ls-laeO @

Step 2: xattr-d com. apple. metadata: kMDItemDownloadedDate memcached. so

Xattr-d com. apple. metadata: kMDItemWhereFroms memcached. so

Xattr-d com. apple. quarantine memcached. so