使用rngd进程增加熵的实际操作过程

最新推荐文章于 2023-04-28 16:28:37 发布

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最新推荐文章于 2023-04-28 16:28:37 发布

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文章标签： linux 熵 entropy

本文链接：https://blog.youkuaiyun.com/msdnchina/article/details/108676475

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[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# yum install rng-tools
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
 * centos-sclo-rh: mirrors.cn99.com
 * centos-sclo-sclo: mirrors.cn99.com
base                                                                                                                                                                              | 3.6 kB  00:00:00     
centos-sclo-rh                                                                                                                                                                    | 3.0 kB  00:00:00     
centos-sclo-sclo                                                                                                                                                                  | 3.0 kB  00:00:00     
epel                                                                                                                                                                              | 4.7 kB  00:00:00     
extras                                                                                                                                                                            | 2.9 kB  00:00:00     
updates                                                                                                                                                                           | 2.9 kB  00:00:00     
Package rng-tools-6.3.1-5.el7.x86_64 already installed and latest version
Nothing to do
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# cat /proc/sys/kernel/random/entropy_avail
140
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# cat /usr/lib/systemd/system/rngd.service
[Unit]
Description=Hardware RNG Entropy Gatherer Daemon

[Service]
ExecStart=/sbin/rngd -f

[Install]
WantedBy=multi-user.target
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# vi /usr/lib/systemd/system/rngd.service
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# 
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# 
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# cat /usr/lib/systemd/system/rngd.service
[Unit]
Description=Hardware RNG Entropy Gatherer Daemon

[Service]
ExecStart=/sbin/rngd -f -r /dev/urandom -o /dev/random

[Install]
WantedBy=multi-user.target
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# systemctl daemon-reload
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# systemctl enable rngd.service
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# systemctl start rngd.service
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# cat /proc/sys/kernel/random/entropy_avail
3080
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]# cat /etc/redhat-release 
CentOS Linux release 7.7.1908 (Core)
[root@iZm5ehqfjhnsbtxrzrnh2zZ ~]#