Hi Devs, If you want to take the backup of subsite in command prompt.
stsadm.exe is in the following installation path”C:Program FilesCommon FilesMicrosoft Sharedweb server extensions12BINstsadm.exe”
Syntax: stsadm.exe -o export -url -filename
Example stsadm.exe -o export -url http://localhost/subsite -filename subsitebackup.dat