應項目要求需要在開機的時候啟動自己的Agent程序，想當然的直接就往/etc/rc.local當中添加啟動命令，結果重啟之后發現什么都沒有發生....一開始還以為是Python路徑的問題，結果改成絕對路徑之后還是一樣，一番搜索之后發現原來是權限問題，執行chmod a+x /etc/rc.d/rc.local解決問題。
其實/etc/rc.local的說明當中已經說的很清楚了， /etc/rc.local只是為了兼容而設置的，若要執行需要為/etc/rc.d/rc.local添加執行權限，看來還是不能慌呀，項目再忙也不能亂了手腳，本來這種稍微看下文檔說明就解決了的問題，結果還是瞎折騰了一下，磨刀不誤砍柴工，古人誠不欺我。
/etc/rc.local實為/etc/rc.d/rc.local的軟連接
[root@10-10-50-109 ~]# ls -l /etc/rc.local
lrwxrwxrwx 1 root root 13 May 26 09:38 /etc/rc.local -> rc.d/rc.local
/etc/rc.d/rc.local默認權限為不可執行
[root@10-10-50-109 ~]# ls -l /etc/rc.d/rc.local
-rw-r--r-- 1 root root 473 Apr 13 03:57 /etc/rc.d/rc.local
[root@10-10-50-109 ~]#
/etc/rc.local當中的說明
[root@10-10-50-109 ~]# cat /etc/rc.local
#!/bin/bash
# THIS FILE IS ADDED FOR COMPATIBILITY PURPOSES
#
# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this file.
#
# In contrast to previous versions due to parallel execution during boot
# this script will NOT be run after all other services.
#
# Please note that you must run 'chmod +x /etc/rc.d/rc.local' to ensure
# that this script will be executed during boot.
touch /var/lock/subsys/local
[root@10-10-50-109 ~]#