Tar & Untar

[root@sysadmin onlinetest]# touch file.txt file2.txt
[root@sysadmin onlinetest]# tar cvf dest.tar file.txt file2.txt
file.txt
file2.txt
[root@sysadmin onlinetest]# tar cvf dest.tar myfolder/.
tar: myfolder/.: Cannot stat: No such file or directory
tar: Exiting with failure status due to previous errors
[root@sysadmin onlinetest]# mkdir myfolder
[root@sysadmin onlinetest]# touch ./myfolder/fileinfolder.txt
[root@sysadmin onlinetest]# tar cvf dest.tar myfolder/.
myfolder/./
myfolder/./fileinfolder.txt
[root@sysadmin onlinetest]# ls
dest.tar  file2.txt  file.txt  myfolder
[root@sysadmin onlinetest]# tar xvf dest.tar
myfolder/./
myfolder/./fileinfolder.txt
[root@sysadmin onlinetest]#