CentOS 7 Boot startup script

The command entered in the/etc/rc.d/init.d file will be executed at boot time, so if it is a simple statement can be directly written in, if it is a script, you can use this file to call your own script, after the attempt, the results of the boot and did not execute, and then found the file in this sentence:

# Please note the must run ' chmod +x/etc/rc.d/rc.local ' to ensure
# That's this script would be executed during boot.

Ls-l The discovery really lacks the execution permission, then executes the chmod +x/etc/rc.d/rc.local and then restarts again succeeds.

CentOS 7 Boot startup script