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linux下某个目录突然写保护，重新mount 解决
查看日志，当时有如下日志
Aug 29 16:30:06 localhost xinetd[2407]: START: telnet pid=5831 from=::ffff:18.0.203.246
Aug 29 16:30:27 localhost xinetd[2407]: EXIT: telnet status=0 pid=5831 duration=21(sec)
Aug 29 16:31:09 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 16:41:20 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 16:51:56 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:02:11 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:12:12 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:22:17 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:32:35 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:40:03 localhost seahorse-daemon[14915]: DNS-SD initialization failed: Daemon not running
Aug 29 17:40:03 localhost seahorse-daemon[14915]: init gpgme version 1.1.8
Aug 29 17:40:03 localhost kernel: fuse init (API version 7.13)
Aug 29 17:42:38 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 17:52:47 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:02:59 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:13:23 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:24:07 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:34:47 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:44:56 localhost clamd[2421]: SelfCheck: Database status OK.
Aug 29 18:47:17 localhost kernel: EXT4-fs error (device sdb1): ext4_put_super: Couldn't clean up the journal
Aug 29 18:47:39 localhost kernel: EXT4-fs warning (device sdb1): ext4_clear_journal_err: Filesystem error recorded from previous mount: IO failure
Aug 29 18:47:39 localhost kernel: EXT4-fs warning (device sdb1): ext4_clear_journal_err: Marking fs in need of filesystem check.
Aug 29 18:47:39 localhost kernel: EXT4-fs (sdb1): warning: mounting fs with errors, running e2fsck is recommended
Aug 29 18:47:39 localhost kernel: EXT4-fs (sdb1): recovery complete
Aug 29 18:47:39 localhost kernel: EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts:
Aug 29 18:55:15 localhost clamd[2421]: SelfCheck: Database status OK.
各位大神，这个是怎么回事啊，谢谢！！！！