When a centos startup error occurs, the system prompts unexpected inconsistency; run fsck manually.

1. Enter the command to find the root partition: Mount | grep "on" 2. then run the command fsck to fix fsck-y/dev/sda2 (root partition). Note: The-Y option specifies that yes3 is automatically input for each file to be detected. Fsck fixed the boot partition fsck-y/dev/sda13. Reboot restart OK

 

Fsck. ext4 [-panyrcdfvtdfv] [-B superblock] [-B blocksize]
               [-I inode_buffer_blocks] [-P process_inode_size]
               [-L |-l bad_blocks_file] [-c fd] [-J external_journal]
               [-E extended-options] Device

Emergency help:
 -P                 Automatic repair (no questions)
 -N                 Make no changes to the filesystem
 -Y                 Assume "yes" to all questions
 -C                 Check for Bad blocks and add them to the badblock list
 -F                 Force checking even if filesystem is marked clean
 -V                 Be verbose
 -Bsuperblock      Use alternative superblock
 -Bblocksize       Force blocksize when looking for superblock
 -J external_journalSetlocation of the external Journal
 -Lbad_blocks_file Add tobadblocks list
 -Lbad_blocks_file Set badblockslist