E2FSCK(8) (NAME) e2fsck - ext2/ext3/ext4 (SYNOPSIS) e2fsck [ -pacnydfvktDFV ] [ -b ] [ -B _ ] [ -l|-L __ ] [ -C ] [ -j _ ] [ -E _ ] [ -z _ ] (DESCRIPTION) e2fsck ext . ext3 ext4 (unclean) (clean) . e2fsck . ( /dev/sdc1) . e2fsck () . -n -c -l -L . e2fsck . e2fsck <> () . . e2fsck ( -y -n -p ) . <> <> <> Enter . Control-C e2fsck . (OPTIONS) -a -p . -p . -b . . sparse_super . mke2fs -n mke2fs ( sparse_super ). e2fsck . -B _ e2fsck . . e2fsck . e2fsck . -c e2fsck badblocks(8) (bad blocks) . . / . -C e2fsck (file descriptor) . e2fsck . SIGUSR1 e2fsck . 0 e2fsck . e2fsck . -d ( e2fsck ). -D . e2fsck . -D e2fsck -- . -D . . -D e2fsck . -E _ e2fsck. ('=') . : ea_ver=__ (extended attribute) e2fsck . . . journal_only . fragcheck (pass 1) . discard (discard / TRIM) ( SSD thin-provisioned ). . e2fsck . nodiscard . discard . no_optimize_extents (extent tree) . /etc/e2fsck.conf . optimize_extents . /etc/e2fsck.conf . inode_count_fullmap (hard- linked). . . ( .) /etc/e2fsck.conf . no_inode_count_fullmap inode_count_fullmap. /etc/e2fsck.conf . readahead_kb ( ) (pre-fetch) e2fsck. ( ext4) / . . bmap2extent (block-mapped) (extent-mapped). fixes_only htree . -D -E bmap2extent . check_encoding (case-insensitive). strict . unshare_blocks (unshare) . . . (clone) . unshare_blocks -f . -n e2fsck (deduplicate) . . -f (clean) . -F (buffer caches) . e2fsck . -j _ (external-journal) . -k -c badblocks(8) . -l _ _ . badblocks(8) . badblocks(8) . -c e2fsck badblocks . -L _ _. ( -l .) -n <> () . e2fsck . -p -y . -p (<>) . e2fsck . e2fsck e2fsck OR ( ). . -n -y . -r . -t e2fsck. (pass) . -v (verbose). -V . -y <> () e2fsck . -n -p . -z _ (undo file) . e2undo(8) . _ e2fsck-.e2undo E2FSPROGS_UNDO_DIR . : (system crash) . (EXIT CODE) e2fsck : 0 - 1 - 2 - (reboot) 4 - 8 - 16 - 32 - E2fsck 128 - (SIGNALS) e2fsck : SIGUSR1 e2fsck ( -C ). SIGUSR2 e2fsck . (REPORTING BUGS) . e2fsck e2fsck . . e2fsck . ( e2fsck e2fsck LC_ALL C e2fsck .) script(1) e2fsck . dumpe2fs(8) . e2fsck debugfs(8) stat(1u) () . dump debugfs uuencode(1) . e2image(8) . e2image(8) . (version) e2fsck . (ENVIRONMENT) E2FSCK_CONFIG ( e2fsck.conf(5) ). (AUTHOR) e2fsck Theodore Ts'o . (SEE ALSO) e2fsck.conf(5), badblocks(8), dumpe2fs(8), debugfs(8), e2image(8), mke2fs(8), tune2fs(8) e2fsprogs E2FSCK(8)