ssh myserver journalctl

回答: "ssh myserver journalctl"是一个命令行命令，用于在名为"myserver"的主机上查看SSH登录日志。该命令使用了journalctl工具，它可以查看系统日志。在这个命令中，"grep sshd"用于筛选出包含"sshd"关键字的日志行，"grep "Disconnected from""用于进一步筛选出包含"Disconnected from"关键字的日志行，"sed 's/.*Disconnected from //'"用于通过正则表达式进行替换，将"Disconnected from"之前的内容删除，只保留用户名。这样可以得到所有SSH登录中断的用户名。如果想对登录用户名进行排序并查看每个用户名的出现次数，可以使用"sort | uniq -c"命令来实现。<em>1</em><em>2</em><em>3</em>
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