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save critical ext2/ext3/ext4 filesystem metadata to a file e2label change the label on an ext2/ext3/ext4 filesystem e2scrub check a filesystem "online" (i.e. without having to unmount it) in the case where the filesystem is on an LVM LV e2undo replay an undo log for an ext2/ext3/ext4 filesystem e4defrag online defragmenter for ext4 filesystem ...
Some newer file systems, such as Btrfs and FreeBSD UFS2, attempt to solve this through techniques called block suballocation and tail merging. Other file systems such as ZFS support variable block sizes. [4] [5] Block storage is normally abstracted by a file system or database management system (DBMS) for use by
Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.
The interface allows for selection of specific parts of filesystem being scanned so a single folder, the entire filesystem, and even remote folders and filesystems can be scanned. [4] The graphical representation can be switched between a ring chart and a treemap chart so the presentation can be tailored to the specific content being scanned. [5]
The inode pointer structure is a structure adopted by the inode of a file in the Version 6 Unix file system, Version 7 Unix file system, and Unix File System (UFS) to list the addresses of a file's data blocks. It is also adopted by many related file systems, including the ext3 file system, popular with Linux users.
With larger disks and larger files, fragmented reads became more of a problem. To combat this, BSD originally increased the filesystem block size from one sector to 1 K in 4.0 BSD; and, in FFS, increased the filesystem block size from 1 K to 8 K. This has several effects. The chance of a file's sectors being contiguous is much greater.
edquota – Edit user quotas for file system; setquota – Set disk quotas for file system; repquota – Summarize quotas for a file system; quotacheck – File system quota consistency checker; quotaon – Turn file system quotas on and off; /etc/fstab or /etc/vfstab – list of default parameters for each file system including quota status.
In computing, the Global File System 2 (GFS2) is a shared-disk file system for Linux computer clusters. GFS2 allows all members of a cluster to have direct concurrent access to the same shared block storage , in contrast to distributed file systems which distribute data throughout the cluster.