矫正Kali Linux时间

在树莓派Zero W上运行Kali Linux之后，发现每次尝试更新系统都出现如下报错：

root@kali:~# apt update
Get:1 http://mirrors.neusoft.edu.cn/kali kali-rolling InRelease [30.5 kB]
Reading package lists... Done
W: http: aptMethod::Configuration: could not load seccomp policy: Invalid argument
W: http: aptMethod::Configuration: could not load seccomp policy: Invalid argument
E: Release file for http://http.kali.org/kali/dists/kali-rolling/InRelease is not valid yet (invalid for another 101d 9h 32min 36s). Updates for this repository will not be applied.

可以看到提示信息中显示时间差异invalid for another 101d 9h 32min 36s，仔细检查系统时间可以看到，当前系统时钟还停留在2017年，而准确的当前时间是2018年：

root@kali:~# date
Thu Dec 21 14:36:31 UTC 2017

矫正Kali Linux时钟

配置时区

BIOS时间设置local模式

编辑 /etc/timezone 设置

Asia/Shanghai

硬件时钟

在树莓派上没有如何设置硬件时钟的方法（参考How to check if hardware clock is in UTC or Local time），使用sudo hwclok --debug显示：

Trying to open: /dev/rtc0
Trying to open: /dev/rtc
Trying to open: /dev/misc/rtc
No usable clock interface found.
hwclock: Cannot access the Hardware Clock via any known method.

检查timedatectl显示输出

# timedatectl status
                      Local time: Thu 2017-12-21 14:54:17 UTC
                  Universal time: Thu 2017-12-21 14:54:17 UTC
                        RTC time: n/a
                       Time zone: Etc/UTC (UTC, +0000)
       System clock synchronized: no
systemd-timesyncd.service active: yes
                 RTC in local TZ: no

设置本地时间软链接

/etc/localtime 做软链接指向时区

unlink /etc/localtime
ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

矫正系统时间

ntpdate pool.ntp.org

此时检查时钟如下：

# timedatectl status
                      Local time: Mon 2018-04-02 11:56:49 CST
                  Universal time: Mon 2018-04-02 03:56:49 UTC
                        RTC time: n/a
                       Time zone: Asia/Shanghai (CST, +0800)
       System clock synchronized: no
systemd-timesyncd.service active: yes
                 RTC in local TZ: no

检查和设置时钟同步

• 检查timesyncd服务

# systemctl status systemd-timesyncd

● systemd-timesyncd.service - Network Time Synchronization
   Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendo
   Active: failed (Result: exit-code) since Fri 2017-12-15 06:10:29 CST; 3 month
     Docs: man:systemd-timesyncd.service(8)
 Main PID: 302 (code=exited, status=1/FAILURE)
   Status: "Shutting down..."

Dec 15 06:10:29 kali systemd[1]: systemd-timesyncd.service: Service has no hold-
Dec 15 06:10:29 kali systemd[1]: systemd-timesyncd.service: Scheduled restart jo
Dec 15 06:10:29 kali systemd[1]: Stopped Network Time Synchronization.
Dec 15 06:10:29 kali systemd[1]: systemd-timesyncd.service: Start request repeat
Dec 15 06:10:29 kali systemd[1]: systemd-timesyncd.service: Failed with result '
Dec 15 06:10:29 kali systemd[1]: Failed to start Network Time Synchronization.

• 启动过timesyncd

systemctl start systemd-timesyncd.service

• 设置系统启动时启动时间同步（不过默认就是启动的）

systemctl enable systemd-timesyncd.service

完成时钟同步之后，再次使用apt update就不会报错了

参考

• Date Time

• Time Synchronisation