[HowTo] Install and configure Oleg's firmware

[GS_IT]

Now I get this error
[root@WL-001FC64989AD root]$ flashfs save && flashfs commit && flashfs enable && reboot
/sbin/flashfs: /sbin/flashfs: 20: cat: Permission denied
/sbin/flashfs: /sbin/flashfs: 73: [: Permission denied
tar: Removing leading '/' from member names
tar: /tmp/local: Unknown file type
tar: Error exit delayed from previous errors
/sbin/flashfs: /sbin/flashfs: 73: ls: Permission denied