Sip files and Extensions

When the files of sip and exntensions are running can be copied using scp, my question this command can damage the files? I know that this question is not directly related to asterisk. but I ask the question because in the past days a copy of these files was made and since then I have had problems with my asterisk demo 1.8

That is an OS question, not an Asterisk one.

scp will do nothing more than modify the last accessed time,for the source file, so I think you need to look elsewhere.