Linux System Management 2-File system Management

Source: Internet
Author: User
Tags uuid

Theory: 1. Common file Systems
    Linux文件系统: ext2, ext3, ext4, xfs, btrfs, reiserfs, jfs, swap(交换分区)iso9660(光盘)    Windows:fat32, ntfs    Unix: FFS, UFS, JFS2    网络文件系统:NFS, CIFS    集群文件系统:GFS2, OCFS2    分布式文件系统:ceph, moosefs, mogilefs, GlusterFS, Lustre    在centos7上,查看支持的文件系统:cat /proc/filesystems  其中没写nodev的为正在使用的文件系统
2. According to whether it supports the "journal" (log) function classification:
    日志型文件系统: ext3, ext4, xfs, ...    非日志型文件系统: ext2, vfat
3. Components of the file system:
    内核中的模块:ext4, xfs, vfat    用户空间的管理工具:mkfs.ext4, mkfs.xfs, mkfs.vfat    说明:用户空间的管理工具调用内核中的模块,来实现文件系统的管理功能。
4.Linux virtual file system: VFS
Practice: (i) Create file system common tools: 1. MKFS command:
        用法1:         mkfs.FS_TYPE /dev/DEVICE            常用FS_TYPE:                ext4                xfs                btrfs                vfat

Usage 2:# mkfs-t Fs_type/dev/device

2. Mke2fs:ext Series file system dedicated management tools
        选项:        -t {ext2|ext3|ext4}          -b {1024|2048|4096}  指明块大小        -L ‘LABEL‘  卷标        -j: 相当于 -t ext3        -i 数字: 为数据空间中每多少个字节创建一个inode;此大小不应该小于block的大小;        -N 数字:为数据空间创建个多少个inode;        -m 数字: 为管理人员预留的空间占据的百分比;        -O FEATURE[,...]:启用指定特性            -O ^FEATURE:关闭指定特性老实说,如果没有特殊需求的话,使用“mkfs -t ext3...” 不但容易记忆,而且非常好用。               mkfs.ext3 = mkfs -t ext3 = mke2fs -j = mke2fs -t ext3

Set the volume label for this file system to: "XXL"; my block is specified as 2048 size; each 8192byte allocates an inode; Build the Ext3 file system.

3. Mkswap: Creating a Swap partition
        mkswap [options] device            -L ‘LABEL‘        *前提:调整其分区的ID为82;
Other common tools: 4.blkid: Block device properties Information view
        blkid [OPTION]... [DEVICE]            -U UUID: 根据指定的UUID来查找对应的设备            -L LABEL:根据指定的LABEL来查找对应的设备
5.e2label: Manage Label for ext series File system
        # e2label DEVICE [LABEL]
6.TUNE2FS: Reset the values of the EXT series file system adjustable parameters
        -l:查看指定文件系统超级块信息;super block        -L ‘LABEL‘:修改卷标        -m #:修预留给管理员的空间百分比        -j: 将ext2升级为ext3        -O: 文件系统属性启用或禁用        -o: 调整文件系统的默认挂载选项        -U UUID: 修改UUID号;
        -h:查看超级块信息(二)文件系统检测:    fsck: File System CheCk        fsck.FS_TYPE         fsck -t FS_TYPE            -a: 自动修复错误            -r: 交互式修复错误            注意: FS_TYPE一定要与分区上已经文件类型相同;    e2fsck:ext系列文件专用的检测修复工具        -y:自动回答为yes;         -f:强制修复;

Linux System Management 2-File system Management

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