查看权限

执行命令ll /etc/rc.local

1	-rw-r--r-- 1 root root 319 Dec 19 15:51 /etc/rc.local*

rc.local中的命令，会在启动时执行。rc.local文件默认没有执行权限，这样不会启动时运行，需要添加执行权限。

修改权限

1	chmod 775 /etc/rc.local

查看权限ll /etc/rc.local

1	-rwxrwxrwx 1 root root 319 Dec 19 15:51 /etc/rc.local*

查看文件

执行命令cat /etc/rc.local

# !/bin/sh -e
# 
#  rc.local
# 
#  This script is executed at the end of each multiuser runlevel.
#  Make sure that the script will "exit 0" on success or any other
#  value on error.
# 
#  In order to enable or disable this script just change the execution
#  bits.
# 
#  By default this script does nothing.

#  挂载磁盘
mount /dev/vdb1 /mnt

exit 0

把需要执行的命令或脚本写入文件，注意写在exit 0之前。相关的脚本，记得都添加执行权限