
tar:tar命令
xzf:x是解压释放;z代表gz格式;f代表file
-C:后跟目录,解压到这个目录下
应该是系统重启后重建log文件到现在的时间:2+17:38:两天零17小时38分钟The pseudo user reboot logs in each time the system is rebooted. Thus last
reboot will show a log of all reboots since the log file was created.
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