last: /var/log/wtmp: No such file or directory

last: /var/log/wtmp: No such file or directory 错误解决方法
在使用last 命令时出现了如下错误：

root@instance-642k0w3w:~# last
last: /var/log/wtmp: No such file or directory
Perhaps this file was removed by the operator to prevent logging last info.
显示没有这个文件，可能是之前清楚日志的时候连文件一起删除了。现在给出解决方案，在shell命令行里直接输入：

touch /var/log/wtmp ; chown root:utmp /var/log/wtmp ; chmod 0664 /var/log/wtmp

再次执行 last 命令，就正常了。

lastlog
/var/log/lastlog: No such file or directory

touch /var/log/lastlog chown root:utmp /var/log/lastlog ; chmod 0664 /var/log/lastlog