could not open port devttyACM0,but i use sudo chmod 666dev

CHMOD 666 the - PHPJunkyard support forum chmod 666 Note : * means that all files of the directory must be chmoded as indicated Example : Files data* : rights = 666 UNIX command = chmod 666 chmod 777 chmod 666 varrun ubuntu@ip-172-31-21-106:varrun$ ls -lrth srw-rw-rw- 1 root root 0 Oct 17 11:08

pung666 chmod 666 readwrite by anybody! chmod 755 rwx for owner, rx for group and rx for the world