相信通常使用vps主机的用户都知道vps主机又出了新的功能，即保存vps快照，那么从本质上来说，其实就是对vps主机进行一次备份，而备份对于网站安全来讲却也是重中之重。
vps主机实时的状态快照其实就是将快照保存一周，然后将其从系统中删除。此时，要么需要拍摄另一个快照，要么将原始快照移动到长期存储区域。许多虚拟主机托管公司会以每月几美元的费用为提供保存这些快照的能力。如果拍摄了另一张快照，那么前一张就会被删除。
那vps主机实时状态快照对于网站的安全为啥如此重要呢？
近几年来，网站的安全威胁太多了，几乎不可能全部进行跟踪。从木马病毒到恶意软件到勒索软件，黑客有很多方法让网站瘫痪或感染，使其成为成为其他恶意软件传播的焦点。
如果这真的发生了，网站流量会大幅降低，因为没有人会相信一个感染了病毒的网站。因此定期进行安全扫描，加强网站上的病毒防御措施非常重要。
比如说，许多人都熟悉现代电子游戏的工作方式。玩家必须在游戏中移动到一个可以保存数据的地方。如果选择不保存数据而导致角色下线，那么必须重新开始参加游戏。
快照也是如此。这些保存的数据就是VPS主机的备份。如果出现了什么意外，它可以帮助网站恢复到最后的“保存状态”，而不必担心数据丢失等问题。
而快照可以提高网站的防御系数。假设出现的最坏的情况，有东西会溜进来，感染了网站。当这种情况发生时，快照可以让网站恢复到以前（即更安全）的状态。
网站快照可以保存从VPS配置到在网站上精心设置的自定义功能的所有内容。另一种选择是，每周末都要拍摄一张快照，旧快照需要删除并替换为新快照。这会形成一系列完整的快照，如果网站出现问题可以立即恢复到原始状态。
所以为了充分保障网站内容和安全因素，避免发生意外事件，使用vps实时状态快照也许是个不错的选择。
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