红帽全球峰会3.4. dhcpd 服务的租期数据库
DHCP 租期是 dhcpd 服务为客户端分配网络地址的期限。dhcpd 服务将 DHCP 租期存储在以下数据库中：
-
对于 DHCPv4：
/var/lib/dhcpd/dhcpd.leases -
对于 DHCPv6：
/var/lib/dhcpd/dhcpd6.leases
警告
手动更新数据库文件可能会破坏数据库。
租期数据库包含有关分配的租期的信息，如分配给 MAC 地址的 IP 地址或租期到期的时间戳。请注意，租期数据库中的所有时间戳都是 UTC。
dhcpd 服务定期重新创建数据库：
该服务重命名现有文件：
-
将
/var/lib/dhcpd/dhcpd.leases重命名为/var/lib/dhcpd/dhcpd.leases~ -
/var/lib/dhcpd/dhcpd6.leases重命名为/var/lib/dhcpd/dhcpd6.leases~
-
将
-
服务将所有已知的租期写入新创建的
/var/lib/dhcpd/dhcpd。leases和/var/lib/dhcpd/dhcpd6.leases文件。
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